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Finding the Fourth Proportional to 18,687.70, 25,795.27 and 11,136.39

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Solution

The fourth proportional to 18,687.70, 25,795.27 and 11,136.39 is: 15,371.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.70 : 25,795.27 = 11,136.39 : x
  2. Step 2: Convert to fraction form
    18,687.70/25,795.27 = 11,136.39/x
  3. Step 3: Cross multiply
    18,687.70x = 25,795.27 × 11,136.39
  4. Step 4: Simplify right side
    18,687.70x = 287,266,223.52
  5. Step 5: Solve for x
    x = 287,266,223.52/18,687.70
  6. Step 6: Final answer
    x = 15,371.95

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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.