Home / 15,747.91-21,731.31-8,672.97

Finding the Fourth Proportional to 15,747.91, 21,731.31 and 8,672.97

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Solution

The fourth proportional to 15,747.91, 21,731.31 and 8,672.97 is: 11,968.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,747.91 : 21,731.31 = 8,672.97 : x
  2. Step 2: Convert to fraction form
    15,747.91/21,731.31 = 8,672.97/x
  3. Step 3: Cross multiply
    15,747.91x = 21,731.31 × 8,672.97
  4. Step 4: Simplify right side
    15,747.91x = 188,474,999.69
  5. Step 5: Solve for x
    x = 188,474,999.69/15,747.91
  6. Step 6: Final answer
    x = 11,968.25

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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.