Home / 2,125.91-3,186.78-1,013.40

Finding the Fourth Proportional to 2,125.91, 3,186.78 and 1,013.40

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Solution

The fourth proportional to 2,125.91, 3,186.78 and 1,013.40 is: 1,519.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.91 : 3,186.78 = 1,013.40 : x
  2. Step 2: Convert to fraction form
    2,125.91/3,186.78 = 1,013.40/x
  3. Step 3: Cross multiply
    2,125.91x = 3,186.78 × 1,013.40
  4. Step 4: Simplify right side
    2,125.91x = 3,229,482.85
  5. Step 5: Solve for x
    x = 3,229,482.85/2,125.91
  6. Step 6: Final answer
    x = 1,519.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.