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Finding the Fourth Proportional to 8,463.61, 12,696.77 and 2,620.20

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Solution

The fourth proportional to 8,463.61, 12,696.77 and 2,620.20 is: 3,930.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,463.61 : 12,696.77 = 2,620.20 : x
  2. Step 2: Convert to fraction form
    8,463.61/12,696.77 = 2,620.20/x
  3. Step 3: Cross multiply
    8,463.61x = 12,696.77 × 2,620.20
  4. Step 4: Simplify right side
    8,463.61x = 33,268,076.75
  5. Step 5: Solve for x
    x = 33,268,076.75/8,463.61
  6. Step 6: Final answer
    x = 3,930.72

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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.