Home / 3,934.10-5,428.85-2,165.36

Finding the Fourth Proportional to 3,934.10, 5,428.85 and 2,165.36

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Solution

The fourth proportional to 3,934.10, 5,428.85 and 2,165.36 is: 2,988.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.10 : 5,428.85 = 2,165.36 : x
  2. Step 2: Convert to fraction form
    3,934.10/5,428.85 = 2,165.36/x
  3. Step 3: Cross multiply
    3,934.10x = 5,428.85 × 2,165.36
  4. Step 4: Simplify right side
    3,934.10x = 11,755,376.66
  5. Step 5: Solve for x
    x = 11,755,376.66/3,934.10
  6. Step 6: Final answer
    x = 2,988.08

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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.