Home / 20,860.82-31,291.25-5,278.44

Finding the Fourth Proportional to 20,860.82, 31,291.25 and 5,278.44

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Solution

The fourth proportional to 20,860.82, 31,291.25 and 5,278.44 is: 7,917.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.82 : 31,291.25 = 5,278.44 : x
  2. Step 2: Convert to fraction form
    20,860.82/31,291.25 = 5,278.44/x
  3. Step 3: Cross multiply
    20,860.82x = 31,291.25 × 5,278.44
  4. Step 4: Simplify right side
    20,860.82x = 165,168,959.26
  5. Step 5: Solve for x
    x = 165,168,959.26/20,860.82
  6. Step 6: Final answer
    x = 7,917.67

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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.