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Finding the Fourth Proportional to 16,860.78, 25,269.90 and 8,542.89

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Solution

The fourth proportional to 16,860.78, 25,269.90 and 8,542.89 is: 12,803.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,860.78 : 25,269.90 = 8,542.89 : x
  2. Step 2: Convert to fraction form
    16,860.78/25,269.90 = 8,542.89/x
  3. Step 3: Cross multiply
    16,860.78x = 25,269.90 × 8,542.89
  4. Step 4: Simplify right side
    16,860.78x = 215,877,976.01
  5. Step 5: Solve for x
    x = 215,877,976.01/16,860.78
  6. Step 6: Final answer
    x = 12,803.56

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1.5x scale

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.