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Finding the Fourth Proportional to 15,591.66, 21,517.98 and 8,519.16

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Solution

The fourth proportional to 15,591.66, 21,517.98 and 8,519.16 is: 11,757.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591.66 : 21,517.98 = 8,519.16 : x
  2. Step 2: Convert to fraction form
    15,591.66/21,517.98 = 8,519.16/x
  3. Step 3: Cross multiply
    15,591.66x = 21,517.98 × 8,519.16
  4. Step 4: Simplify right side
    15,591.66x = 183,315,114.50
  5. Step 5: Solve for x
    x = 183,315,114.50/15,591.66
  6. Step 6: Final answer
    x = 11,757.25

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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.