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Finding the Fourth Proportional to 15,842.75, 21,863.68 and 8,769.17

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Solution

The fourth proportional to 15,842.75, 21,863.68 and 8,769.17 is: 12,101.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,842.75 : 21,863.68 = 8,769.17 : x
  2. Step 2: Convert to fraction form
    15,842.75/21,863.68 = 8,769.17/x
  3. Step 3: Cross multiply
    15,842.75x = 21,863.68 × 8,769.17
  4. Step 4: Simplify right side
    15,842.75x = 191,726,326.75
  5. Step 5: Solve for x
    x = 191,726,326.75/15,842.75
  6. Step 6: Final answer
    x = 12,101.83

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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.