Home / 3,138.61-4,329.63-2,391.27

Finding the Fourth Proportional to 3,138.61, 4,329.63 and 2,391.27

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Solution

The fourth proportional to 3,138.61, 4,329.63 and 2,391.27 is: 3,298.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.61 : 4,329.63 = 2,391.27 : x
  2. Step 2: Convert to fraction form
    3,138.61/4,329.63 = 2,391.27/x
  3. Step 3: Cross multiply
    3,138.61x = 4,329.63 × 2,391.27
  4. Step 4: Simplify right side
    3,138.61x = 10,353,330.85
  5. Step 5: Solve for x
    x = 10,353,330.85/3,138.61
  6. Step 6: Final answer
    x = 3,298.70

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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.