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Finding the Fourth Proportional to 8,439.48, 12,584.78 and 8,025.63

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Solution

The fourth proportional to 8,439.48, 12,584.78 and 8,025.63 is: 11,967.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.48 : 12,584.78 = 8,025.63 : x
  2. Step 2: Convert to fraction form
    8,439.48/12,584.78 = 8,025.63/x
  3. Step 3: Cross multiply
    8,439.48x = 12,584.78 × 8,025.63
  4. Step 4: Simplify right side
    8,439.48x = 101,000,747.78
  5. Step 5: Solve for x
    x = 101,000,747.78/8,439.48
  6. Step 6: Final answer
    x = 11,967.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.