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Finding the Fourth Proportional to 16,761.20, 25,141.80 and 8,985.20

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Solution

The fourth proportional to 16,761.20, 25,141.80 and 8,985.20 is: 13,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,761.20 : 25,141.80 = 8,985.20 : x
  2. Step 2: Convert to fraction form
    16,761.20/25,141.80 = 8,985.20/x
  3. Step 3: Cross multiply
    16,761.20x = 25,141.80 × 8,985.20
  4. Step 4: Simplify right side
    16,761.20x = 225,904,101.36
  5. Step 5: Solve for x
    x = 225,904,101.36/16,761.20
  6. Step 6: Final answer
    x = 13,477.80

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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.