Home / 3,927.18-5,419.50-2,158.78

Finding the Fourth Proportional to 3,927.18, 5,419.50 and 2,158.78

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Solution

The fourth proportional to 3,927.18, 5,419.50 and 2,158.78 is: 2,979.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.18 : 5,419.50 = 2,158.78 : x
  2. Step 2: Convert to fraction form
    3,927.18/5,419.50 = 2,158.78/x
  3. Step 3: Cross multiply
    3,927.18x = 5,419.50 × 2,158.78
  4. Step 4: Simplify right side
    3,927.18x = 11,699,508.21
  5. Step 5: Solve for x
    x = 11,699,508.21/3,927.18
  6. Step 6: Final answer
    x = 2,979.11

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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.