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Finding the Fourth Proportional to 15,866.75, 21,896.10 and 8,793.17

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Solution

The fourth proportional to 15,866.75, 21,896.10 and 8,793.17 is: 12,134.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,866.75 : 21,896.10 = 8,793.17 : x
  2. Step 2: Convert to fraction form
    15,866.75/21,896.10 = 8,793.17/x
  3. Step 3: Cross multiply
    15,866.75x = 21,896.10 × 8,793.17
  4. Step 4: Simplify right side
    15,866.75x = 192,536,020.16
  5. Step 5: Solve for x
    x = 192,536,020.16/15,866.75
  6. Step 6: Final answer
    x = 12,134.56

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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.