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Finding the Fourth Proportional to 18,866.24, 28,311.24 and 10,551.70

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Solution

The fourth proportional to 18,866.24, 28,311.24 and 10,551.70 is: 15,834.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.24 : 28,311.24 = 10,551.70 : x
  2. Step 2: Convert to fraction form
    18,866.24/28,311.24 = 10,551.70/x
  3. Step 3: Cross multiply
    18,866.24x = 28,311.24 × 10,551.70
  4. Step 4: Simplify right side
    18,866.24x = 298,731,711.11
  5. Step 5: Solve for x
    x = 298,731,711.11/18,866.24
  6. Step 6: Final answer
    x = 15,834.19

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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.