Home / 12,001.80-18,002.70-7,854.60

Finding the Fourth Proportional to 12,001.80, 18,002.70 and 7,854.60

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Solution

The fourth proportional to 12,001.80, 18,002.70 and 7,854.60 is: 11,781.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,001.80 : 18,002.70 = 7,854.60 : x
  2. Step 2: Convert to fraction form
    12,001.80/18,002.70 = 7,854.60/x
  3. Step 3: Cross multiply
    12,001.80x = 18,002.70 × 7,854.60
  4. Step 4: Simplify right side
    12,001.80x = 141,404,007.42
  5. Step 5: Solve for x
    x = 141,404,007.42/12,001.80
  6. Step 6: Final answer
    x = 11,781.90

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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.