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Finding the Fourth Proportional to 8,865.30, 13,211.07 and 8,087.70

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Solution

The fourth proportional to 8,865.30, 13,211.07 and 8,087.70 is: 12,052.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,865.30 : 13,211.07 = 8,087.70 : x
  2. Step 2: Convert to fraction form
    8,865.30/13,211.07 = 8,087.70/x
  3. Step 3: Cross multiply
    8,865.30x = 13,211.07 × 8,087.70
  4. Step 4: Simplify right side
    8,865.30x = 106,847,170.84
  5. Step 5: Solve for x
    x = 106,847,170.84/8,865.30
  6. Step 6: Final answer
    x = 12,052.29

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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.