Home / 5,122.82-7,066.94-3,129.90

Finding the Fourth Proportional to 5,122.82, 7,066.94 and 3,129.90

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Solution

The fourth proportional to 5,122.82, 7,066.94 and 3,129.90 is: 4,317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,122.82 : 7,066.94 = 3,129.90 : x
  2. Step 2: Convert to fraction form
    5,122.82/7,066.94 = 3,129.90/x
  3. Step 3: Cross multiply
    5,122.82x = 7,066.94 × 3,129.90
  4. Step 4: Simplify right side
    5,122.82x = 22,118,799.86
  5. Step 5: Solve for x
    x = 22,118,799.86/5,122.82
  6. Step 6: Final answer
    x = 4,317.70

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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.