Home / 20,373.75-28,115.84-11,299.76

Finding the Fourth Proportional to 20,373.75, 28,115.84 and 11,299.76

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Solution

The fourth proportional to 20,373.75, 28,115.84 and 11,299.76 is: 15,593.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.75 : 28,115.84 = 11,299.76 : x
  2. Step 2: Convert to fraction form
    20,373.75/28,115.84 = 11,299.76/x
  3. Step 3: Cross multiply
    20,373.75x = 28,115.84 × 11,299.76
  4. Step 4: Simplify right side
    20,373.75x = 317,702,244.20
  5. Step 5: Solve for x
    x = 317,702,244.20/20,373.75
  6. Step 6: Final answer
    x = 15,593.70

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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.