Home / 3,934.18-5,428.84-2,255.20

Finding the Fourth Proportional to 3,934.18, 5,428.84 and 2,255.20

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Solution

The fourth proportional to 3,934.18, 5,428.84 and 2,255.20 is: 3,111.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.18 : 5,428.84 = 2,255.20 : x
  2. Step 2: Convert to fraction form
    3,934.18/5,428.84 = 2,255.20/x
  3. Step 3: Cross multiply
    3,934.18x = 5,428.84 × 2,255.20
  4. Step 4: Simplify right side
    3,934.18x = 12,243,110.74
  5. Step 5: Solve for x
    x = 12,243,110.74/3,934.18
  6. Step 6: Final answer
    x = 3,111.99

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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.