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Finding the Fourth Proportional to 13,710.66, 20,572.46 and 13,489.53

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Solution

The fourth proportional to 13,710.66, 20,572.46 and 13,489.53 is: 20,240.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.66 : 20,572.46 = 13,489.53 : x
  2. Step 2: Convert to fraction form
    13,710.66/20,572.46 = 13,489.53/x
  3. Step 3: Cross multiply
    13,710.66x = 20,572.46 × 13,489.53
  4. Step 4: Simplify right side
    13,710.66x = 277,512,816.34
  5. Step 5: Solve for x
    x = 277,512,816.34/13,710.66
  6. Step 6: Final answer
    x = 20,240.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.