Home / 8,505.28-12,756.96-2,660.80

Finding the Fourth Proportional to 8,505.28, 12,756.96 and 2,660.80

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Solution

The fourth proportional to 8,505.28, 12,756.96 and 2,660.80 is: 3,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.28 : 12,756.96 = 2,660.80 : x
  2. Step 2: Convert to fraction form
    8,505.28/12,756.96 = 2,660.80/x
  3. Step 3: Cross multiply
    8,505.28x = 12,756.96 × 2,660.80
  4. Step 4: Simplify right side
    8,505.28x = 33,943,719.17
  5. Step 5: Solve for x
    x = 33,943,719.17/8,505.28
  6. Step 6: Final answer
    x = 3,990.90

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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.