Home / 15,731.71-21,710.19-8,658.58

Finding the Fourth Proportional to 15,731.71, 21,710.19 and 8,658.58

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Solution

The fourth proportional to 15,731.71, 21,710.19 and 8,658.58 is: 11,949.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.71 : 21,710.19 = 8,658.58 : x
  2. Step 2: Convert to fraction form
    15,731.71/21,710.19 = 8,658.58/x
  3. Step 3: Cross multiply
    15,731.71x = 21,710.19 × 8,658.58
  4. Step 4: Simplify right side
    15,731.71x = 187,979,416.93
  5. Step 5: Solve for x
    x = 187,979,416.93/15,731.71
  6. Step 6: Final answer
    x = 11,949.08

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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.