Home / 12,489.60-17,229.12-8,456.52

Finding the Fourth Proportional to 12,489.60, 17,229.12 and 8,456.52

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Solution

The fourth proportional to 12,489.60, 17,229.12 and 8,456.52 is: 11,665.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.60 : 17,229.12 = 8,456.52 : x
  2. Step 2: Convert to fraction form
    12,489.60/17,229.12 = 8,456.52/x
  3. Step 3: Cross multiply
    12,489.60x = 17,229.12 × 8,456.52
  4. Step 4: Simplify right side
    12,489.60x = 145,698,397.86
  5. Step 5: Solve for x
    x = 145,698,397.86/12,489.60
  6. Step 6: Final answer
    x = 11,665.58

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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.