Home / 3,931.20-5,427.57-2,440.68

Finding the Fourth Proportional to 3,931.20, 5,427.57 and 2,440.68

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Solution

The fourth proportional to 3,931.20, 5,427.57 and 2,440.68 is: 3,369.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.20 : 5,427.57 = 2,440.68 : x
  2. Step 2: Convert to fraction form
    3,931.20/5,427.57 = 2,440.68/x
  3. Step 3: Cross multiply
    3,931.20x = 5,427.57 × 2,440.68
  4. Step 4: Simplify right side
    3,931.20x = 13,246,961.55
  5. Step 5: Solve for x
    x = 13,246,961.55/3,931.20
  6. Step 6: Final answer
    x = 3,369.70

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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.