Home / 3,123.20-4,300.80-2,791.50

Finding the Fourth Proportional to 3,123.20, 4,300.80 and 2,791.50

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Solution

The fourth proportional to 3,123.20, 4,300.80 and 2,791.50 is: 3,844.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.20 : 4,300.80 = 2,791.50 : x
  2. Step 2: Convert to fraction form
    3,123.20/4,300.80 = 2,791.50/x
  3. Step 3: Cross multiply
    3,123.20x = 4,300.80 × 2,791.50
  4. Step 4: Simplify right side
    3,123.20x = 12,005,683.20
  5. Step 5: Solve for x
    x = 12,005,683.20/3,123.20
  6. Step 6: Final answer
    x = 3,844.03

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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.