Home / 20,186.30-30,279.45-15,515.30

Finding the Fourth Proportional to 20,186.30, 30,279.45 and 15,515.30

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Solution

The fourth proportional to 20,186.30, 30,279.45 and 15,515.30 is: 23,272.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,186.30 : 30,279.45 = 15,515.30 : x
  2. Step 2: Convert to fraction form
    20,186.30/30,279.45 = 15,515.30/x
  3. Step 3: Cross multiply
    20,186.30x = 30,279.45 × 15,515.30
  4. Step 4: Simplify right side
    20,186.30x = 469,794,750.59
  5. Step 5: Solve for x
    x = 469,794,750.59/20,186.30
  6. Step 6: Final answer
    x = 23,272.95

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Double scale
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Similar ratio
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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.