Home / 3,981.25-5,495.61-2,989.39

Finding the Fourth Proportional to 3,981.25, 5,495.61 and 2,989.39

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Solution

The fourth proportional to 3,981.25, 5,495.61 and 2,989.39 is: 4,126.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.25 : 5,495.61 = 2,989.39 : x
  2. Step 2: Convert to fraction form
    3,981.25/5,495.61 = 2,989.39/x
  3. Step 3: Cross multiply
    3,981.25x = 5,495.61 × 2,989.39
  4. Step 4: Simplify right side
    3,981.25x = 16,428,535.92
  5. Step 5: Solve for x
    x = 16,428,535.92/3,981.25
  6. Step 6: Final answer
    x = 4,126.48

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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.