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Finding the Fourth Proportional to 3,639.72, 5,019.12 and 2,974.44

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Solution

The fourth proportional to 3,639.72, 5,019.12 and 2,974.44 is: 4,101.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.72 : 5,019.12 = 2,974.44 : x
  2. Step 2: Convert to fraction form
    3,639.72/5,019.12 = 2,974.44/x
  3. Step 3: Cross multiply
    3,639.72x = 5,019.12 × 2,974.44
  4. Step 4: Simplify right side
    3,639.72x = 14,929,071.29
  5. Step 5: Solve for x
    x = 14,929,071.29/3,639.72
  6. Step 6: Final answer
    x = 4,101.71

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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.