Home / 3,981.14-5,490.75-2,785.68

Finding the Fourth Proportional to 3,981.14, 5,490.75 and 2,785.68

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Solution

The fourth proportional to 3,981.14, 5,490.75 and 2,785.68 is: 3,841.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.14 : 5,490.75 = 2,785.68 : x
  2. Step 2: Convert to fraction form
    3,981.14/5,490.75 = 2,785.68/x
  3. Step 3: Cross multiply
    3,981.14x = 5,490.75 × 2,785.68
  4. Step 4: Simplify right side
    3,981.14x = 15,295,472.46
  5. Step 5: Solve for x
    x = 15,295,472.46/3,981.14
  6. Step 6: Final answer
    x = 3,841.98

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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.