Home / 10,081.20-15,105.60-7,456.80

Finding the Fourth Proportional to 10,081.20, 15,105.60 and 7,456.80

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Solution

The fourth proportional to 10,081.20, 15,105.60 and 7,456.80 is: 11,173.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,081.20 : 15,105.60 = 7,456.80 : x
  2. Step 2: Convert to fraction form
    10,081.20/15,105.60 = 7,456.80/x
  3. Step 3: Cross multiply
    10,081.20x = 15,105.60 × 7,456.80
  4. Step 4: Simplify right side
    10,081.20x = 112,639,438.08
  5. Step 5: Solve for x
    x = 112,639,438.08/10,081.20
  6. Step 6: Final answer
    x = 11,173.22

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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.