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Finding the Fourth Proportional to 11,280.87, 15,558.15 and 8,454.87

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Solution

The fourth proportional to 11,280.87, 15,558.15 and 8,454.87 is: 11,660.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,280.87 : 15,558.15 = 8,454.87 : x
  2. Step 2: Convert to fraction form
    11,280.87/15,558.15 = 8,454.87/x
  3. Step 3: Cross multiply
    11,280.87x = 15,558.15 × 8,454.87
  4. Step 4: Simplify right side
    11,280.87x = 131,542,174.59
  5. Step 5: Solve for x
    x = 131,542,174.59/11,280.87
  6. Step 6: Final answer
    x = 11,660.65

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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.