Home / 12,379,428,007.80-18,569,142,011.70-7,971,443,777.40

Finding the Fourth Proportional to 12,379,428,007.80, 18,569,142,011.70 and 7,971,443,777.40

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Solution

The fourth proportional to 12,379,428,007.80, 18,569,142,011.70 and 7,971,443,777.40 is: 11,957,165,666.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379,428,007.80 : 18,569,142,011.70 = 7,971,443,777.40 : x
  2. Step 2: Convert to fraction form
    12,379,428,007.80/18,569,142,011.70 = 7,971,443,777.40/x
  3. Step 3: Cross multiply
    12,379,428,007.80x = 18,569,142,011.70 × 7,971,443,777.40
  4. Step 4: Simplify right side
    12,379,428,007.80x = 148,022,871,540,822,867,968
  5. Step 5: Solve for x
    x = 148,022,871,540,822,867,968/12,379,428,007.80
  6. Step 6: Final answer
    x = 11,957,165,666.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.