Home / 15,591.45-21,516.18-8,517.87

Finding the Fourth Proportional to 15,591.45, 21,516.18 and 8,517.87

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Solution

The fourth proportional to 15,591.45, 21,516.18 and 8,517.87 is: 11,754.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591.45 : 21,516.18 = 8,517.87 : x
  2. Step 2: Convert to fraction form
    15,591.45/21,516.18 = 8,517.87/x
  3. Step 3: Cross multiply
    15,591.45x = 21,516.18 × 8,517.87
  4. Step 4: Simplify right side
    15,591.45x = 183,272,024.14
  5. Step 5: Solve for x
    x = 183,272,024.14/15,591.45
  6. Step 6: Final answer
    x = 11,754.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.