Home / 9,115.88-12,579.98-5,581.44

Finding the Fourth Proportional to 9,115.88, 12,579.98 and 5,581.44

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Solution

The fourth proportional to 9,115.88, 12,579.98 and 5,581.44 is: 7,702.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.88 : 12,579.98 = 5,581.44 : x
  2. Step 2: Convert to fraction form
    9,115.88/12,579.98 = 5,581.44/x
  3. Step 3: Cross multiply
    9,115.88x = 12,579.98 × 5,581.44
  4. Step 4: Simplify right side
    9,115.88x = 70,214,375.66
  5. Step 5: Solve for x
    x = 70,214,375.66/9,115.88
  6. Step 6: Final answer
    x = 7,702.43

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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.