Home / 2,175.12-3,007.56-2,139.95

Finding the Fourth Proportional to 2,175.12, 3,007.56 and 2,139.95

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Solution

The fourth proportional to 2,175.12, 3,007.56 and 2,139.95 is: 2,958.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.12 : 3,007.56 = 2,139.95 : x
  2. Step 2: Convert to fraction form
    2,175.12/3,007.56 = 2,139.95/x
  3. Step 3: Cross multiply
    2,175.12x = 3,007.56 × 2,139.95
  4. Step 4: Simplify right side
    2,175.12x = 6,436,025.85
  5. Step 5: Solve for x
    x = 6,436,025.85/2,175.12
  6. Step 6: Final answer
    x = 2,958.94

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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.