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Finding the Fourth Proportional to 15,829.16, 21,843.99 and 8,755.43

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Solution

The fourth proportional to 15,829.16, 21,843.99 and 8,755.43 is: 12,082.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,829.16 : 21,843.99 = 8,755.43 : x
  2. Step 2: Convert to fraction form
    15,829.16/21,843.99 = 8,755.43/x
  3. Step 3: Cross multiply
    15,829.16x = 21,843.99 × 8,755.43
  4. Step 4: Simplify right side
    15,829.16x = 191,253,416.15
  5. Step 5: Solve for x
    x = 191,253,416.15/15,829.16
  6. Step 6: Final answer
    x = 12,082.35

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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.