Home / 2,386.75-3,286.36-2,120.72

Finding the Fourth Proportional to 2,386.75, 3,286.36 and 2,120.72

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Solution

The fourth proportional to 2,386.75, 3,286.36 and 2,120.72 is: 2,920.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,386.75 : 3,286.36 = 2,120.72 : x
  2. Step 2: Convert to fraction form
    2,386.75/3,286.36 = 2,120.72/x
  3. Step 3: Cross multiply
    2,386.75x = 3,286.36 × 2,120.72
  4. Step 4: Simplify right side
    2,386.75x = 6,969,449.38
  5. Step 5: Solve for x
    x = 6,969,449.38/2,386.75
  6. Step 6: Final answer
    x = 2,920.06

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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.