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Finding the Fourth Proportional to 10,424.68, 15,639.36 and 3,499

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Solution

The fourth proportional to 10,424.68, 15,639.36 and 3,499 is: 5,249.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,424.68 : 15,639.36 = 3,499 : x
  2. Step 2: Convert to fraction form
    10,424.68/15,639.36 = 3,499/x
  3. Step 3: Cross multiply
    10,424.68x = 15,639.36 × 3,499
  4. Step 4: Simplify right side
    10,424.68x = 54,722,120.64
  5. Step 5: Solve for x
    x = 54,722,120.64/10,424.68
  6. Step 6: Final answer
    x = 5,249.29

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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.