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Finding the Fourth Proportional to 8,841.20, 13,261.80 and 2,685.20

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Solution

The fourth proportional to 8,841.20, 13,261.80 and 2,685.20 is: 4,027.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,841.20 : 13,261.80 = 2,685.20 : x
  2. Step 2: Convert to fraction form
    8,841.20/13,261.80 = 2,685.20/x
  3. Step 3: Cross multiply
    8,841.20x = 13,261.80 × 2,685.20
  4. Step 4: Simplify right side
    8,841.20x = 35,610,519.05
  5. Step 5: Solve for x
    x = 35,610,519.05/8,841.20
  6. Step 6: Final answer
    x = 4,027.79

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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.