Home / 10,939.20-16,411.68-3,148.64

Finding the Fourth Proportional to 10,939.20, 16,411.68 and 3,148.64

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Solution

The fourth proportional to 10,939.20, 16,411.68 and 3,148.64 is: 4,723.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.20 : 16,411.68 = 3,148.64 : x
  2. Step 2: Convert to fraction form
    10,939.20/16,411.68 = 3,148.64/x
  3. Step 3: Cross multiply
    10,939.20x = 16,411.68 × 3,148.64
  4. Step 4: Simplify right side
    10,939.20x = 51,674,472.12
  5. Step 5: Solve for x
    x = 51,674,472.12/10,939.20
  6. Step 6: Final answer
    x = 4,723.79

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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.