Home / 4,138.75-5,711.48-2,275.75

Finding the Fourth Proportional to 4,138.75, 5,711.48 and 2,275.75

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Solution

The fourth proportional to 4,138.75, 5,711.48 and 2,275.75 is: 3,140.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,138.75 : 5,711.48 = 2,275.75 : x
  2. Step 2: Convert to fraction form
    4,138.75/5,711.48 = 2,275.75/x
  3. Step 3: Cross multiply
    4,138.75x = 5,711.48 × 2,275.75
  4. Step 4: Simplify right side
    4,138.75x = 12,997,900.61
  5. Step 5: Solve for x
    x = 12,997,900.61/4,138.75
  6. Step 6: Final answer
    x = 3,140.54

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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.