Home / 3,988.20-5,498.70-3,427.56

Finding the Fourth Proportional to 3,988.20, 5,498.70 and 3,427.56

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Solution

The fourth proportional to 3,988.20, 5,498.70 and 3,427.56 is: 4,725.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.20 : 5,498.70 = 3,427.56 : x
  2. Step 2: Convert to fraction form
    3,988.20/5,498.70 = 3,427.56/x
  3. Step 3: Cross multiply
    3,988.20x = 5,498.70 × 3,427.56
  4. Step 4: Simplify right side
    3,988.20x = 18,847,124.17
  5. Step 5: Solve for x
    x = 18,847,124.17/3,988.20
  6. Step 6: Final answer
    x = 4,725.72

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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.