Home / 8,673.28-13,013.92-3,128.88

Finding the Fourth Proportional to 8,673.28, 13,013.92 and 3,128.88

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Solution

The fourth proportional to 8,673.28, 13,013.92 and 3,128.88 is: 4,694.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,673.28 : 13,013.92 = 3,128.88 : x
  2. Step 2: Convert to fraction form
    8,673.28/13,013.92 = 3,128.88/x
  3. Step 3: Cross multiply
    8,673.28x = 13,013.92 × 3,128.88
  4. Step 4: Simplify right side
    8,673.28x = 40,718,994.01
  5. Step 5: Solve for x
    x = 40,718,994.01/8,673.28
  6. Step 6: Final answer
    x = 4,694.76

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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.