Home / 3,151.90-4,351.49-2,801.57

Finding the Fourth Proportional to 3,151.90, 4,351.49 and 2,801.57

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Solution

The fourth proportional to 3,151.90, 4,351.49 and 2,801.57 is: 3,867.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,151.90 : 4,351.49 = 2,801.57 : x
  2. Step 2: Convert to fraction form
    3,151.90/4,351.49 = 2,801.57/x
  3. Step 3: Cross multiply
    3,151.90x = 4,351.49 × 2,801.57
  4. Step 4: Simplify right side
    3,151.90x = 12,191,000.71
  5. Step 5: Solve for x
    x = 12,191,000.71/3,151.90
  6. Step 6: Final answer
    x = 3,867.83

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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.