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Finding the Fourth Proportional to 8,540.40, 12,812.40 and 2,616.80

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Solution

The fourth proportional to 8,540.40, 12,812.40 and 2,616.80 is: 3,925.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.40 : 12,812.40 = 2,616.80 : x
  2. Step 2: Convert to fraction form
    8,540.40/12,812.40 = 2,616.80/x
  3. Step 3: Cross multiply
    8,540.40x = 12,812.40 × 2,616.80
  4. Step 4: Simplify right side
    8,540.40x = 33,527,488.32
  5. Step 5: Solve for x
    x = 33,527,488.32/8,540.40
  6. Step 6: Final answer
    x = 3,925.75

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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.