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Finding the Fourth Proportional to 18,136.52, 25,028.34 and 10,178.78

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Solution

The fourth proportional to 18,136.52, 25,028.34 and 10,178.78 is: 14,046.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,136.52 : 25,028.34 = 10,178.78 : x
  2. Step 2: Convert to fraction form
    18,136.52/25,028.34 = 10,178.78/x
  3. Step 3: Cross multiply
    18,136.52x = 25,028.34 × 10,178.78
  4. Step 4: Simplify right side
    18,136.52x = 254,757,966.63
  5. Step 5: Solve for x
    x = 254,757,966.63/18,136.52
  6. Step 6: Final answer
    x = 14,046.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.