Home / 8,661.28-12,999.36-3,470.72

Finding the Fourth Proportional to 8,661.28, 12,999.36 and 3,470.72

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Solution

The fourth proportional to 8,661.28, 12,999.36 and 3,470.72 is: 5,209.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.28 : 12,999.36 = 3,470.72 : x
  2. Step 2: Convert to fraction form
    8,661.28/12,999.36 = 3,470.72/x
  3. Step 3: Cross multiply
    8,661.28x = 12,999.36 × 3,470.72
  4. Step 4: Simplify right side
    8,661.28x = 45,117,138.74
  5. Step 5: Solve for x
    x = 45,117,138.74/8,661.28
  6. Step 6: Final answer
    x = 5,209.06

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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.