Home / 10,480.20-15,721.38-3,458.16

Finding the Fourth Proportional to 10,480.20, 15,721.38 and 3,458.16

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Solution

The fourth proportional to 10,480.20, 15,721.38 and 3,458.16 is: 5,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,480.20 : 15,721.38 = 3,458.16 : x
  2. Step 2: Convert to fraction form
    10,480.20/15,721.38 = 3,458.16/x
  3. Step 3: Cross multiply
    10,480.20x = 15,721.38 × 3,458.16
  4. Step 4: Simplify right side
    10,480.20x = 54,367,047.46
  5. Step 5: Solve for x
    x = 54,367,047.46/10,480.20
  6. Step 6: Final answer
    x = 5,187.60

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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.