Home / 20,996.68-28,974.78-11,565.04

Finding the Fourth Proportional to 20,996.68, 28,974.78 and 11,565.04

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Solution

The fourth proportional to 20,996.68, 28,974.78 and 11,565.04 is: 15,959.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.68 : 28,974.78 = 11,565.04 : x
  2. Step 2: Convert to fraction form
    20,996.68/28,974.78 = 11,565.04/x
  3. Step 3: Cross multiply
    20,996.68x = 28,974.78 × 11,565.04
  4. Step 4: Simplify right side
    20,996.68x = 335,094,489.69
  5. Step 5: Solve for x
    x = 335,094,489.69/20,996.68
  6. Step 6: Final answer
    x = 15,959.40

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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.