Home / 8,171.31-11,278.79-5,339.10

Finding the Fourth Proportional to 8,171.31, 11,278.79 and 5,339.10

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Solution

The fourth proportional to 8,171.31, 11,278.79 and 5,339.10 is: 7,369.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,171.31 : 11,278.79 = 5,339.10 : x
  2. Step 2: Convert to fraction form
    8,171.31/11,278.79 = 5,339.10/x
  3. Step 3: Cross multiply
    8,171.31x = 11,278.79 × 5,339.10
  4. Step 4: Simplify right side
    8,171.31x = 60,218,560.99
  5. Step 5: Solve for x
    x = 60,218,560.99/8,171.31
  6. Step 6: Final answer
    x = 7,369.51

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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.