Home / 7,149.38-10,721.55-2,987.21

Finding the Fourth Proportional to 7,149.38, 10,721.55 and 2,987.21

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Solution

The fourth proportional to 7,149.38, 10,721.55 and 2,987.21 is: 4,479.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149.38 : 10,721.55 = 2,987.21 : x
  2. Step 2: Convert to fraction form
    7,149.38/10,721.55 = 2,987.21/x
  3. Step 3: Cross multiply
    7,149.38x = 10,721.55 × 2,987.21
  4. Step 4: Simplify right side
    7,149.38x = 32,027,521.38
  5. Step 5: Solve for x
    x = 32,027,521.38/7,149.38
  6. Step 6: Final answer
    x = 4,479.76

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1.5x scale

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.