Home / 20,718.32-28,591.30-11,286.90

Finding the Fourth Proportional to 20,718.32, 28,591.30 and 11,286.90

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Solution

The fourth proportional to 20,718.32, 28,591.30 and 11,286.90 is: 15,575.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.32 : 28,591.30 = 11,286.90 : x
  2. Step 2: Convert to fraction form
    20,718.32/28,591.30 = 11,286.90/x
  3. Step 3: Cross multiply
    20,718.32x = 28,591.30 × 11,286.90
  4. Step 4: Simplify right side
    20,718.32x = 322,707,143.97
  5. Step 5: Solve for x
    x = 322,707,143.97/20,718.32
  6. Step 6: Final answer
    x = 15,575.93

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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.