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Finding the Fourth Proportional to 16,887.80, 25,331.70 and 8,139.80

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Solution

The fourth proportional to 16,887.80, 25,331.70 and 8,139.80 is: 12,209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,887.80 : 25,331.70 = 8,139.80 : x
  2. Step 2: Convert to fraction form
    16,887.80/25,331.70 = 8,139.80/x
  3. Step 3: Cross multiply
    16,887.80x = 25,331.70 × 8,139.80
  4. Step 4: Simplify right side
    16,887.80x = 206,194,971.66
  5. Step 5: Solve for x
    x = 206,194,971.66/16,887.80
  6. Step 6: Final answer
    x = 12,209.70

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.