Home / 3,120.81-4,307.34-2,871.73

Finding the Fourth Proportional to 3,120.81, 4,307.34 and 2,871.73

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Solution

The fourth proportional to 3,120.81, 4,307.34 and 2,871.73 is: 3,963.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.81 : 4,307.34 = 2,871.73 : x
  2. Step 2: Convert to fraction form
    3,120.81/4,307.34 = 2,871.73/x
  3. Step 3: Cross multiply
    3,120.81x = 4,307.34 × 2,871.73
  4. Step 4: Simplify right side
    3,120.81x = 12,369,517.50
  5. Step 5: Solve for x
    x = 12,369,517.50/3,120.81
  6. Step 6: Final answer
    x = 3,963.56

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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.