Home / 20,279.28-30,423.69-9,185.93

Finding the Fourth Proportional to 20,279.28, 30,423.69 and 9,185.93

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Solution

The fourth proportional to 20,279.28, 30,423.69 and 9,185.93 is: 13,781.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.28 : 30,423.69 = 9,185.93 : x
  2. Step 2: Convert to fraction form
    20,279.28/30,423.69 = 9,185.93/x
  3. Step 3: Cross multiply
    20,279.28x = 30,423.69 × 9,185.93
  4. Step 4: Simplify right side
    20,279.28x = 279,469,734.56
  5. Step 5: Solve for x
    x = 279,469,734.56/20,279.28
  6. Step 6: Final answer
    x = 13,781.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.