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Finding the Fourth Proportional to 18,616.78, 27,925.10 and 8,085.43

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Solution

The fourth proportional to 18,616.78, 27,925.10 and 8,085.43 is: 12,128.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.78 : 27,925.10 = 8,085.43 : x
  2. Step 2: Convert to fraction form
    18,616.78/27,925.10 = 8,085.43/x
  3. Step 3: Cross multiply
    18,616.78x = 27,925.10 × 8,085.43
  4. Step 4: Simplify right side
    18,616.78x = 225,786,441.29
  5. Step 5: Solve for x
    x = 225,786,441.29/18,616.78
  6. Step 6: Final answer
    x = 12,128.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.