Home / 10,279.20-15,421.20-5,349.60

Finding the Fourth Proportional to 10,279.20, 15,421.20 and 5,349.60

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Solution

The fourth proportional to 10,279.20, 15,421.20 and 5,349.60 is: 8,025.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,279.20 : 15,421.20 = 5,349.60 : x
  2. Step 2: Convert to fraction form
    10,279.20/15,421.20 = 5,349.60/x
  3. Step 3: Cross multiply
    10,279.20x = 15,421.20 × 5,349.60
  4. Step 4: Simplify right side
    10,279.20x = 82,497,251.52
  5. Step 5: Solve for x
    x = 82,497,251.52/10,279.20
  6. Step 6: Final answer
    x = 8,025.65

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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.