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Finding the Fourth Proportional to 13,710.80, 20,614.80 and 11,572.40

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Solution

The fourth proportional to 13,710.80, 20,614.80 and 11,572.40 is: 17,399.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.80 : 20,614.80 = 11,572.40 : x
  2. Step 2: Convert to fraction form
    13,710.80/20,614.80 = 11,572.40/x
  3. Step 3: Cross multiply
    13,710.80x = 20,614.80 × 11,572.40
  4. Step 4: Simplify right side
    13,710.80x = 238,562,711.52
  5. Step 5: Solve for x
    x = 238,562,711.52/13,710.80
  6. Step 6: Final answer
    x = 17,399.62

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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.