Home / 3,149.85-4,342.29-2,153.55

Finding the Fourth Proportional to 3,149.85, 4,342.29 and 2,153.55

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Solution

The fourth proportional to 3,149.85, 4,342.29 and 2,153.55 is: 2,968.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,149.85 : 4,342.29 = 2,153.55 : x
  2. Step 2: Convert to fraction form
    3,149.85/4,342.29 = 2,153.55/x
  3. Step 3: Cross multiply
    3,149.85x = 4,342.29 × 2,153.55
  4. Step 4: Simplify right side
    3,149.85x = 9,351,338.63
  5. Step 5: Solve for x
    x = 9,351,338.63/3,149.85
  6. Step 6: Final answer
    x = 2,968.82

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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.