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Finding the Fourth Proportional to 8,787.24, 12,134.48 and 5,648.90

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Solution

The fourth proportional to 8,787.24, 12,134.48 and 5,648.90 is: 7,800.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787.24 : 12,134.48 = 5,648.90 : x
  2. Step 2: Convert to fraction form
    8,787.24/12,134.48 = 5,648.90/x
  3. Step 3: Cross multiply
    8,787.24x = 12,134.48 × 5,648.90
  4. Step 4: Simplify right side
    8,787.24x = 68,546,375.16
  5. Step 5: Solve for x
    x = 68,546,375.16/8,787.24
  6. Step 6: Final answer
    x = 7,800.67

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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.