Home / 5,120.70-7,066.47-3,131.11

Finding the Fourth Proportional to 5,120.70, 7,066.47 and 3,131.11

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Solution

The fourth proportional to 5,120.70, 7,066.47 and 3,131.11 is: 4,320.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.70 : 7,066.47 = 3,131.11 : x
  2. Step 2: Convert to fraction form
    5,120.70/7,066.47 = 3,131.11/x
  3. Step 3: Cross multiply
    5,120.70x = 7,066.47 × 3,131.11
  4. Step 4: Simplify right side
    5,120.70x = 22,125,894.88
  5. Step 5: Solve for x
    x = 22,125,894.88/5,120.70
  6. Step 6: Final answer
    x = 4,320.87

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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.