Home / 20,966.45-31,451.88-10,439.08

Finding the Fourth Proportional to 20,966.45, 31,451.88 and 10,439.08

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Solution

The fourth proportional to 20,966.45, 31,451.88 and 10,439.08 is: 15,659.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.45 : 31,451.88 = 10,439.08 : x
  2. Step 2: Convert to fraction form
    20,966.45/31,451.88 = 10,439.08/x
  3. Step 3: Cross multiply
    20,966.45x = 31,451.88 × 10,439.08
  4. Step 4: Simplify right side
    20,966.45x = 328,328,691.47
  5. Step 5: Solve for x
    x = 328,328,691.47/20,966.45
  6. Step 6: Final answer
    x = 15,659.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.