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Finding the Fourth Proportional to 8,572.88, 12,866.16 and 3,382.40

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Solution

The fourth proportional to 8,572.88, 12,866.16 and 3,382.40 is: 5,076.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,572.88 : 12,866.16 = 3,382.40 : x
  2. Step 2: Convert to fraction form
    8,572.88/12,866.16 = 3,382.40/x
  3. Step 3: Cross multiply
    8,572.88x = 12,866.16 × 3,382.40
  4. Step 4: Simplify right side
    8,572.88x = 43,518,499.58
  5. Step 5: Solve for x
    x = 43,518,499.58/8,572.88
  6. Step 6: Final answer
    x = 5,076.30

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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.