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Finding the Fourth Proportional to 13,591.92, 20,395.50 and 7,351.80

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Solution

The fourth proportional to 13,591.92, 20,395.50 and 7,351.80 is: 11,031.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,591.92 : 20,395.50 = 7,351.80 : x
  2. Step 2: Convert to fraction form
    13,591.92/20,395.50 = 7,351.80/x
  3. Step 3: Cross multiply
    13,591.92x = 20,395.50 × 7,351.80
  4. Step 4: Simplify right side
    13,591.92x = 149,943,636.90
  5. Step 5: Solve for x
    x = 149,943,636.90/13,591.92
  6. Step 6: Final answer
    x = 11,031.82

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1.5x scale

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.