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Finding the Fourth Proportional to 18,869.67, 28,292.11 and 10,550.57

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Solution

The fourth proportional to 18,869.67, 28,292.11 and 10,550.57 is: 15,818.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.67 : 28,292.11 = 10,550.57 : x
  2. Step 2: Convert to fraction form
    18,869.67/28,292.11 = 10,550.57/x
  3. Step 3: Cross multiply
    18,869.67x = 28,292.11 × 10,550.57
  4. Step 4: Simplify right side
    18,869.67x = 298,497,719.17
  5. Step 5: Solve for x
    x = 298,497,719.17/18,869.67
  6. Step 6: Final answer
    x = 15,818.92

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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.