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Finding the Fourth Proportional to 7,022.68, 9,691.30 and 3,878.88

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Solution

The fourth proportional to 7,022.68, 9,691.30 and 3,878.88 is: 5,352.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,022.68 : 9,691.30 = 3,878.88 : x
  2. Step 2: Convert to fraction form
    7,022.68/9,691.30 = 3,878.88/x
  3. Step 3: Cross multiply
    7,022.68x = 9,691.30 × 3,878.88
  4. Step 4: Simplify right side
    7,022.68x = 37,591,389.74
  5. Step 5: Solve for x
    x = 37,591,389.74/7,022.68
  6. Step 6: Final answer
    x = 5,352.86

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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.