Home / 15,731.10-21,708.92-8,657.37

Finding the Fourth Proportional to 15,731.10, 21,708.92 and 8,657.37

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Solution

The fourth proportional to 15,731.10, 21,708.92 and 8,657.37 is: 11,947.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.10 : 21,708.92 = 8,657.37 : x
  2. Step 2: Convert to fraction form
    15,731.10/21,708.92 = 8,657.37/x
  3. Step 3: Cross multiply
    15,731.10x = 21,708.92 × 8,657.37
  4. Step 4: Simplify right side
    15,731.10x = 187,942,000.91
  5. Step 5: Solve for x
    x = 187,942,000.91/15,731.10
  6. Step 6: Final answer
    x = 11,947.17

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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.