Home / 3,921.32-5,409.58-2,428.70

Finding the Fourth Proportional to 3,921.32, 5,409.58 and 2,428.70

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Solution

The fourth proportional to 3,921.32, 5,409.58 and 2,428.70 is: 3,350.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.32 : 5,409.58 = 2,428.70 : x
  2. Step 2: Convert to fraction form
    3,921.32/5,409.58 = 2,428.70/x
  3. Step 3: Cross multiply
    3,921.32x = 5,409.58 × 2,428.70
  4. Step 4: Simplify right side
    3,921.32x = 13,138,246.95
  5. Step 5: Solve for x
    x = 13,138,246.95/3,921.32
  6. Step 6: Final answer
    x = 3,350.47

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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.