Home / 12,757.28-17,613.81-7,979.30

Finding the Fourth Proportional to 12,757.28, 17,613.81 and 7,979.30

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Solution

The fourth proportional to 12,757.28, 17,613.81 and 7,979.30 is: 11,016.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,757.28 : 17,613.81 = 7,979.30 : x
  2. Step 2: Convert to fraction form
    12,757.28/17,613.81 = 7,979.30/x
  3. Step 3: Cross multiply
    12,757.28x = 17,613.81 × 7,979.30
  4. Step 4: Simplify right side
    12,757.28x = 140,545,874.13
  5. Step 5: Solve for x
    x = 140,545,874.13/12,757.28
  6. Step 6: Final answer
    x = 11,016.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.