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Finding the Fourth Proportional to 14,502.70, 20,013.54 and 8,129.28

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Solution

The fourth proportional to 14,502.70, 20,013.54 and 8,129.28 is: 11,218.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,502.70 : 20,013.54 = 8,129.28 : x
  2. Step 2: Convert to fraction form
    14,502.70/20,013.54 = 8,129.28/x
  3. Step 3: Cross multiply
    14,502.70x = 20,013.54 × 8,129.28
  4. Step 4: Simplify right side
    14,502.70x = 162,695,639.97
  5. Step 5: Solve for x
    x = 162,695,639.97/14,502.70
  6. Step 6: Final answer
    x = 11,218.30

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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.