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Finding the Fourth Proportional to 15,517.26, 21,411 and 8,803.17

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Solution

The fourth proportional to 15,517.26, 21,411 and 8,803.17 is: 12,146.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,517.26 : 21,411 = 8,803.17 : x
  2. Step 2: Convert to fraction form
    15,517.26/21,411 = 8,803.17/x
  3. Step 3: Cross multiply
    15,517.26x = 21,411 × 8,803.17
  4. Step 4: Simplify right side
    15,517.26x = 188,484,672.87
  5. Step 5: Solve for x
    x = 188,484,672.87/15,517.26
  6. Step 6: Final answer
    x = 12,146.78

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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.