Home / 13,520.28-20,286.90-6,591

Finding the Fourth Proportional to 13,520.28, 20,286.90 and 6,591

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Solution

The fourth proportional to 13,520.28, 20,286.90 and 6,591 is: 9,889.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.28 : 20,286.90 = 6,591 : x
  2. Step 2: Convert to fraction form
    13,520.28/20,286.90 = 6,591/x
  3. Step 3: Cross multiply
    13,520.28x = 20,286.90 × 6,591
  4. Step 4: Simplify right side
    13,520.28x = 133,710,957.90
  5. Step 5: Solve for x
    x = 133,710,957.90/13,520.28
  6. Step 6: Final answer
    x = 9,889.66

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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.