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Finding the Fourth Proportional to 15,925.61, 21,977.51 and 8,755.90

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Solution

The fourth proportional to 15,925.61, 21,977.51 and 8,755.90 is: 12,083.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,925.61 : 21,977.51 = 8,755.90 : x
  2. Step 2: Convert to fraction form
    15,925.61/21,977.51 = 8,755.90/x
  3. Step 3: Cross multiply
    15,925.61x = 21,977.51 × 8,755.90
  4. Step 4: Simplify right side
    15,925.61x = 192,432,781.09
  5. Step 5: Solve for x
    x = 192,432,781.09/15,925.61
  6. Step 6: Final answer
    x = 12,083.23

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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.