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Finding the Fourth Proportional to 18,879.59, 28,280.49 and 11,069.57

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Solution

The fourth proportional to 18,879.59, 28,280.49 and 11,069.57 is: 16,581.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.59 : 28,280.49 = 11,069.57 : x
  2. Step 2: Convert to fraction form
    18,879.59/28,280.49 = 11,069.57/x
  3. Step 3: Cross multiply
    18,879.59x = 28,280.49 × 11,069.57
  4. Step 4: Simplify right side
    18,879.59x = 313,052,722.29
  5. Step 5: Solve for x
    x = 313,052,722.29/18,879.59
  6. Step 6: Final answer
    x = 16,581.55

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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.