Home / 14,781.28-20,397.60-8,407.72

Finding the Fourth Proportional to 14,781.28, 20,397.60 and 8,407.72

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Solution

The fourth proportional to 14,781.28, 20,397.60 and 8,407.72 is: 11,602.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,781.28 : 20,397.60 = 8,407.72 : x
  2. Step 2: Convert to fraction form
    14,781.28/20,397.60 = 8,407.72/x
  3. Step 3: Cross multiply
    14,781.28x = 20,397.60 × 8,407.72
  4. Step 4: Simplify right side
    14,781.28x = 171,497,309.47
  5. Step 5: Solve for x
    x = 171,497,309.47/14,781.28
  6. Step 6: Final answer
    x = 11,602.33

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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.