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Finding the Fourth Proportional to 10,460.80, 15,691.20 and 3,535.20

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Solution

The fourth proportional to 10,460.80, 15,691.20 and 3,535.20 is: 5,302.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,460.80 : 15,691.20 = 3,535.20 : x
  2. Step 2: Convert to fraction form
    10,460.80/15,691.20 = 3,535.20/x
  3. Step 3: Cross multiply
    10,460.80x = 15,691.20 × 3,535.20
  4. Step 4: Simplify right side
    10,460.80x = 55,471,530.24
  5. Step 5: Solve for x
    x = 55,471,530.24/10,460.80
  6. Step 6: Final answer
    x = 5,302.80

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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.