Home / 3,895.40-5,377.38-2,638.28

Finding the Fourth Proportional to 3,895.40, 5,377.38 and 2,638.28

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Solution

The fourth proportional to 3,895.40, 5,377.38 and 2,638.28 is: 3,642.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,895.40 : 5,377.38 = 2,638.28 : x
  2. Step 2: Convert to fraction form
    3,895.40/5,377.38 = 2,638.28/x
  3. Step 3: Cross multiply
    3,895.40x = 5,377.38 × 2,638.28
  4. Step 4: Simplify right side
    3,895.40x = 14,187,034.11
  5. Step 5: Solve for x
    x = 14,187,034.11/3,895.40
  6. Step 6: Final answer
    x = 3,642.00

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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.