Home / 8,422.56-12,631.68-4,039.20

Finding the Fourth Proportional to 8,422.56, 12,631.68 and 4,039.20

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Solution

The fourth proportional to 8,422.56, 12,631.68 and 4,039.20 is: 6,057.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,422.56 : 12,631.68 = 4,039.20 : x
  2. Step 2: Convert to fraction form
    8,422.56/12,631.68 = 4,039.20/x
  3. Step 3: Cross multiply
    8,422.56x = 12,631.68 × 4,039.20
  4. Step 4: Simplify right side
    8,422.56x = 51,021,881.86
  5. Step 5: Solve for x
    x = 51,021,881.86/8,422.56
  6. Step 6: Final answer
    x = 6,057.76

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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.