Home / 3,921.28-5,877.12-1,840

Finding the Fourth Proportional to 3,921.28, 5,877.12 and 1,840

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Solution

The fourth proportional to 3,921.28, 5,877.12 and 1,840 is: 2,757.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.28 : 5,877.12 = 1,840 : x
  2. Step 2: Convert to fraction form
    3,921.28/5,877.12 = 1,840/x
  3. Step 3: Cross multiply
    3,921.28x = 5,877.12 × 1,840
  4. Step 4: Simplify right side
    3,921.28x = 10,813,900.80
  5. Step 5: Solve for x
    x = 10,813,900.80/3,921.28
  6. Step 6: Final answer
    x = 2,757.75

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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.