Home / 20,731.14-28,610.17-15,686.62

Finding the Fourth Proportional to 20,731.14, 28,610.17 and 15,686.62

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Solution

The fourth proportional to 20,731.14, 28,610.17 and 15,686.62 is: 21,648.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.14 : 28,610.17 = 15,686.62 : x
  2. Step 2: Convert to fraction form
    20,731.14/28,610.17 = 15,686.62/x
  3. Step 3: Cross multiply
    20,731.14x = 28,610.17 × 15,686.62
  4. Step 4: Simplify right side
    20,731.14x = 448,796,754.18
  5. Step 5: Solve for x
    x = 448,796,754.18/20,731.14
  6. Step 6: Final answer
    x = 21,648.44

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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.