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Finding the Fourth Proportional to 3,854.25, 5,321.16 and 2,921.13

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Solution

The fourth proportional to 3,854.25, 5,321.16 and 2,921.13 is: 4,032.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,854.25 : 5,321.16 = 2,921.13 : x
  2. Step 2: Convert to fraction form
    3,854.25/5,321.16 = 2,921.13/x
  3. Step 3: Cross multiply
    3,854.25x = 5,321.16 × 2,921.13
  4. Step 4: Simplify right side
    3,854.25x = 15,543,800.11
  5. Step 5: Solve for x
    x = 15,543,800.11/3,854.25
  6. Step 6: Final answer
    x = 4,032.90

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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.