Home / 20,439.39-28,206.45-11,489.97

Finding the Fourth Proportional to 20,439.39, 28,206.45 and 11,489.97

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Solution

The fourth proportional to 20,439.39, 28,206.45 and 11,489.97 is: 15,856.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.39 : 28,206.45 = 11,489.97 : x
  2. Step 2: Convert to fraction form
    20,439.39/28,206.45 = 11,489.97/x
  3. Step 3: Cross multiply
    20,439.39x = 28,206.45 × 11,489.97
  4. Step 4: Simplify right side
    20,439.39x = 324,091,264.31
  5. Step 5: Solve for x
    x = 324,091,264.31/20,439.39
  6. Step 6: Final answer
    x = 15,856.21

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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.