Home / 10,255.20-15,387.60-5,330.40

Finding the Fourth Proportional to 10,255.20, 15,387.60 and 5,330.40

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Solution

The fourth proportional to 10,255.20, 15,387.60 and 5,330.40 is: 7,998.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,255.20 : 15,387.60 = 5,330.40 : x
  2. Step 2: Convert to fraction form
    10,255.20/15,387.60 = 5,330.40/x
  3. Step 3: Cross multiply
    10,255.20x = 15,387.60 × 5,330.40
  4. Step 4: Simplify right side
    10,255.20x = 82,022,063.04
  5. Step 5: Solve for x
    x = 82,022,063.04/10,255.20
  6. Step 6: Final answer
    x = 7,998.09

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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.