Home / 12,781.50-17,639.19-7,192.86

Finding the Fourth Proportional to 12,781.50, 17,639.19 and 7,192.86

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Solution

The fourth proportional to 12,781.50, 17,639.19 and 7,192.86 is: 9,926.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,781.50 : 17,639.19 = 7,192.86 : x
  2. Step 2: Convert to fraction form
    12,781.50/17,639.19 = 7,192.86/x
  3. Step 3: Cross multiply
    12,781.50x = 17,639.19 × 7,192.86
  4. Step 4: Simplify right side
    12,781.50x = 126,876,224.18
  5. Step 5: Solve for x
    x = 126,876,224.18/12,781.50
  6. Step 6: Final answer
    x = 9,926.55

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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.