Home / 15,731.72-21,710.28-8,658.68

Finding the Fourth Proportional to 15,731.72, 21,710.28 and 8,658.68

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Solution

The fourth proportional to 15,731.72, 21,710.28 and 8,658.68 is: 11,949.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.72 : 21,710.28 = 8,658.68 : x
  2. Step 2: Convert to fraction form
    15,731.72/21,710.28 = 8,658.68/x
  3. Step 3: Cross multiply
    15,731.72x = 21,710.28 × 8,658.68
  4. Step 4: Simplify right side
    15,731.72x = 187,982,367.23
  5. Step 5: Solve for x
    x = 187,982,367.23/15,731.72
  6. Step 6: Final answer
    x = 11,949.26

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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.