Home / 15,342.72-21,157.92-9,744

Finding the Fourth Proportional to 15,342.72, 21,157.92 and 9,744

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Solution

The fourth proportional to 15,342.72, 21,157.92 and 9,744 is: 13,437.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,342.72 : 21,157.92 = 9,744 : x
  2. Step 2: Convert to fraction form
    15,342.72/21,157.92 = 9,744/x
  3. Step 3: Cross multiply
    15,342.72x = 21,157.92 × 9,744
  4. Step 4: Simplify right side
    15,342.72x = 206,162,772.48
  5. Step 5: Solve for x
    x = 206,162,772.48/15,342.72
  6. Step 6: Final answer
    x = 13,437.17

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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.