Home / 5,478.32-8,211.56-2,187.80

Finding the Fourth Proportional to 5,478.32, 8,211.56 and 2,187.80

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Solution

The fourth proportional to 5,478.32, 8,211.56 and 2,187.80 is: 3,279.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.32 : 8,211.56 = 2,187.80 : x
  2. Step 2: Convert to fraction form
    5,478.32/8,211.56 = 2,187.80/x
  3. Step 3: Cross multiply
    5,478.32x = 8,211.56 × 2,187.80
  4. Step 4: Simplify right side
    5,478.32x = 17,965,250.97
  5. Step 5: Solve for x
    x = 17,965,250.97/5,478.32
  6. Step 6: Final answer
    x = 3,279.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.