Home / 7,142.76-10,721.05-3,447.58

Finding the Fourth Proportional to 7,142.76, 10,721.05 and 3,447.58

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Solution

The fourth proportional to 7,142.76, 10,721.05 and 3,447.58 is: 5,174.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,142.76 : 10,721.05 = 3,447.58 : x
  2. Step 2: Convert to fraction form
    7,142.76/10,721.05 = 3,447.58/x
  3. Step 3: Cross multiply
    7,142.76x = 10,721.05 × 3,447.58
  4. Step 4: Simplify right side
    7,142.76x = 36,961,677.56
  5. Step 5: Solve for x
    x = 36,961,677.56/7,142.76
  6. Step 6: Final answer
    x = 5,174.71

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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.