Home / 13,572.40-20,359.80-3,711.72

Finding the Fourth Proportional to 13,572.40, 20,359.80 and 3,711.72

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Solution

The fourth proportional to 13,572.40, 20,359.80 and 3,711.72 is: 5,567.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.40 : 20,359.80 = 3,711.72 : x
  2. Step 2: Convert to fraction form
    13,572.40/20,359.80 = 3,711.72/x
  3. Step 3: Cross multiply
    13,572.40x = 20,359.80 × 3,711.72
  4. Step 4: Simplify right side
    13,572.40x = 75,569,876.86
  5. Step 5: Solve for x
    x = 75,569,876.86/13,572.40
  6. Step 6: Final answer
    x = 5,567.91

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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.