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Finding the Fourth Proportional to 15,469.55, 21,348.29 and 8,755.17

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Solution

The fourth proportional to 15,469.55, 21,348.29 and 8,755.17 is: 12,082.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,469.55 : 21,348.29 = 8,755.17 : x
  2. Step 2: Convert to fraction form
    15,469.55/21,348.29 = 8,755.17/x
  3. Step 3: Cross multiply
    15,469.55x = 21,348.29 × 8,755.17
  4. Step 4: Simplify right side
    15,469.55x = 186,907,864.38
  5. Step 5: Solve for x
    x = 186,907,864.38/15,469.55
  6. Step 6: Final answer
    x = 12,082.31

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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.