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Finding the Fourth Proportional to 7,891.38, 10,889.82 and 4,354.38

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Solution

The fourth proportional to 7,891.38, 10,889.82 and 4,354.38 is: 6,008.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.38 : 10,889.82 = 4,354.38 : x
  2. Step 2: Convert to fraction form
    7,891.38/10,889.82 = 4,354.38/x
  3. Step 3: Cross multiply
    7,891.38x = 10,889.82 × 4,354.38
  4. Step 4: Simplify right side
    7,891.38x = 47,418,414.41
  5. Step 5: Solve for x
    x = 47,418,414.41/7,891.38
  6. Step 6: Final answer
    x = 6,008.89

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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.