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Finding the Fourth Proportional to 27,909.55, 38,515.11 and 15,973.12

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Solution

The fourth proportional to 27,909.55, 38,515.11 and 15,973.12 is: 22,042.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,909.55 : 38,515.11 = 15,973.12 : x
  2. Step 2: Convert to fraction form
    27,909.55/38,515.11 = 15,973.12/x
  3. Step 3: Cross multiply
    27,909.55x = 38,515.11 × 15,973.12
  4. Step 4: Simplify right side
    27,909.55x = 615,206,281.27
  5. Step 5: Solve for x
    x = 615,206,281.27/27,909.55
  6. Step 6: Final answer
    x = 22,042.86

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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.