Home / 3,627.12-5,000.76-3,128.78

Finding the Fourth Proportional to 3,627.12, 5,000.76 and 3,128.78

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Solution

The fourth proportional to 3,627.12, 5,000.76 and 3,128.78 is: 4,313.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,627.12 : 5,000.76 = 3,128.78 : x
  2. Step 2: Convert to fraction form
    3,627.12/5,000.76 = 3,128.78/x
  3. Step 3: Cross multiply
    3,627.12x = 5,000.76 × 3,128.78
  4. Step 4: Simplify right side
    3,627.12x = 15,646,277.87
  5. Step 5: Solve for x
    x = 15,646,277.87/3,627.12
  6. Step 6: Final answer
    x = 4,313.69

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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.