Home / 11,520.32-17,190.60-10,279.20

Finding the Fourth Proportional to 11,520.32, 17,190.60 and 10,279.20

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Solution

The fourth proportional to 11,520.32, 17,190.60 and 10,279.20 is: 15,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,520.32 : 17,190.60 = 10,279.20 : x
  2. Step 2: Convert to fraction form
    11,520.32/17,190.60 = 10,279.20/x
  3. Step 3: Cross multiply
    11,520.32x = 17,190.60 × 10,279.20
  4. Step 4: Simplify right side
    11,520.32x = 176,705,615.52
  5. Step 5: Solve for x
    x = 176,705,615.52/11,520.32
  6. Step 6: Final answer
    x = 15,338.60

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.