Home / 3,934.12-5,428.88-2,165.66

Finding the Fourth Proportional to 3,934.12, 5,428.88 and 2,165.66

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Solution

The fourth proportional to 3,934.12, 5,428.88 and 2,165.66 is: 2,988.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.12 : 5,428.88 = 2,165.66 : x
  2. Step 2: Convert to fraction form
    3,934.12/5,428.88 = 2,165.66/x
  3. Step 3: Cross multiply
    3,934.12x = 5,428.88 × 2,165.66
  4. Step 4: Simplify right side
    3,934.12x = 11,757,108.26
  5. Step 5: Solve for x
    x = 11,757,108.26/3,934.12
  6. Step 6: Final answer
    x = 2,988.50

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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.