Home / 12,471.20-17,211.98-7,165.90

Finding the Fourth Proportional to 12,471.20, 17,211.98 and 7,165.90

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Solution

The fourth proportional to 12,471.20, 17,211.98 and 7,165.90 is: 9,889.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,471.20 : 17,211.98 = 7,165.90 : x
  2. Step 2: Convert to fraction form
    12,471.20/17,211.98 = 7,165.90/x
  3. Step 3: Cross multiply
    12,471.20x = 17,211.98 × 7,165.90
  4. Step 4: Simplify right side
    12,471.20x = 123,339,327.48
  5. Step 5: Solve for x
    x = 123,339,327.48/12,471.20
  6. Step 6: Final answer
    x = 9,889.93

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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.