Home / 12,379,427,998.80-18,569,141,998.20-7,971,443,768.40

Finding the Fourth Proportional to 12,379,427,998.80, 18,569,141,998.20 and 7,971,443,768.40

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Solution

The fourth proportional to 12,379,427,998.80, 18,569,141,998.20 and 7,971,443,768.40 is: 11,957,165,652.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379,427,998.80 : 18,569,141,998.20 = 7,971,443,768.40 : x
  2. Step 2: Convert to fraction form
    12,379,427,998.80/18,569,141,998.20 = 7,971,443,768.40/x
  3. Step 3: Cross multiply
    12,379,427,998.80x = 18,569,141,998.20 × 7,971,443,768.40
  4. Step 4: Simplify right side
    12,379,427,998.80x = 148,022,871,266,086,125,568
  5. Step 5: Solve for x
    x = 148,022,871,266,086,125,568/12,379,427,998.80
  6. Step 6: Final answer
    x = 11,957,165,652.60

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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.