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Finding the Fourth Proportional to 18,121.66, 25,008.15 and 10,950.58

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Solution

The fourth proportional to 18,121.66, 25,008.15 and 10,950.58 is: 15,111.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.66 : 25,008.15 = 10,950.58 : x
  2. Step 2: Convert to fraction form
    18,121.66/25,008.15 = 10,950.58/x
  3. Step 3: Cross multiply
    18,121.66x = 25,008.15 × 10,950.58
  4. Step 4: Simplify right side
    18,121.66x = 273,853,747.23
  5. Step 5: Solve for x
    x = 273,853,747.23/18,121.66
  6. Step 6: Final answer
    x = 15,111.96

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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.