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Finding the Fourth Proportional to 8,761, 13,140.90 and 2,187.04

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Solution

The fourth proportional to 8,761, 13,140.90 and 2,187.04 is: 3,280.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761 : 13,140.90 = 2,187.04 : x
  2. Step 2: Convert to fraction form
    8,761/13,140.90 = 2,187.04/x
  3. Step 3: Cross multiply
    8,761x = 13,140.90 × 2,187.04
  4. Step 4: Simplify right side
    8,761x = 28,739,673.94
  5. Step 5: Solve for x
    x = 28,739,673.94/8,761
  6. Step 6: Final answer
    x = 3,280.41

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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.