Home / 3,138.85-4,327.02-2,391.52

Finding the Fourth Proportional to 3,138.85, 4,327.02 and 2,391.52

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Solution

The fourth proportional to 3,138.85, 4,327.02 and 2,391.52 is: 3,296.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.85 : 4,327.02 = 2,391.52 : x
  2. Step 2: Convert to fraction form
    3,138.85/4,327.02 = 2,391.52/x
  3. Step 3: Cross multiply
    3,138.85x = 4,327.02 × 2,391.52
  4. Step 4: Simplify right side
    3,138.85x = 10,348,154.87
  5. Step 5: Solve for x
    x = 10,348,154.87/3,138.85
  6. Step 6: Final answer
    x = 3,296.80

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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.