Home / 3,990.66-5,496.82-2,809.68

Finding the Fourth Proportional to 3,990.66, 5,496.82 and 2,809.68

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Solution

The fourth proportional to 3,990.66, 5,496.82 and 2,809.68 is: 3,870.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.66 : 5,496.82 = 2,809.68 : x
  2. Step 2: Convert to fraction form
    3,990.66/5,496.82 = 2,809.68/x
  3. Step 3: Cross multiply
    3,990.66x = 5,496.82 × 2,809.68
  4. Step 4: Simplify right side
    3,990.66x = 15,444,305.22
  5. Step 5: Solve for x
    x = 15,444,305.22/3,990.66
  6. Step 6: Final answer
    x = 3,870.11

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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.