Home / 20,718.40-28,591.44-11,286.76

Finding the Fourth Proportional to 20,718.40, 28,591.44 and 11,286.76

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Solution

The fourth proportional to 20,718.40, 28,591.44 and 11,286.76 is: 15,575.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.40 : 28,591.44 = 11,286.76 : x
  2. Step 2: Convert to fraction form
    20,718.40/28,591.44 = 11,286.76/x
  3. Step 3: Cross multiply
    20,718.40x = 28,591.44 × 11,286.76
  4. Step 4: Simplify right side
    20,718.40x = 322,704,721.33
  5. Step 5: Solve for x
    x = 322,704,721.33/20,718.40
  6. Step 6: Final answer
    x = 15,575.75

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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.