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Finding the Fourth Proportional to 8,568.80, 12,853.20 and 7,912.70

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Solution

The fourth proportional to 8,568.80, 12,853.20 and 7,912.70 is: 11,869.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,568.80 : 12,853.20 = 7,912.70 : x
  2. Step 2: Convert to fraction form
    8,568.80/12,853.20 = 7,912.70/x
  3. Step 3: Cross multiply
    8,568.80x = 12,853.20 × 7,912.70
  4. Step 4: Simplify right side
    8,568.80x = 101,703,515.64
  5. Step 5: Solve for x
    x = 101,703,515.64/8,568.80
  6. Step 6: Final answer
    x = 11,869.05

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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.