Home / 5,317.38-7,974.42-1,421.28

Finding the Fourth Proportional to 5,317.38, 7,974.42 and 1,421.28

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Solution

The fourth proportional to 5,317.38, 7,974.42 and 1,421.28 is: 2,131.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,317.38 : 7,974.42 = 1,421.28 : x
  2. Step 2: Convert to fraction form
    5,317.38/7,974.42 = 1,421.28/x
  3. Step 3: Cross multiply
    5,317.38x = 7,974.42 × 1,421.28
  4. Step 4: Simplify right side
    5,317.38x = 11,333,883.66
  5. Step 5: Solve for x
    x = 11,333,883.66/5,317.38
  6. Step 6: Final answer
    x = 2,131.48

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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.