Home / 8,891.20-12,281.56-6,820.88

Finding the Fourth Proportional to 8,891.20, 12,281.56 and 6,820.88

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Solution

The fourth proportional to 8,891.20, 12,281.56 and 6,820.88 is: 9,421.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,891.20 : 12,281.56 = 6,820.88 : x
  2. Step 2: Convert to fraction form
    8,891.20/12,281.56 = 6,820.88/x
  3. Step 3: Cross multiply
    8,891.20x = 12,281.56 × 6,820.88
  4. Step 4: Simplify right side
    8,891.20x = 83,771,046.97
  5. Step 5: Solve for x
    x = 83,771,046.97/8,891.20
  6. Step 6: Final answer
    x = 9,421.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.