Home / 21,167.83-31,708.67-13,749.85

Finding the Fourth Proportional to 21,167.83, 31,708.67 and 13,749.85

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Solution

The fourth proportional to 21,167.83, 31,708.67 and 13,749.85 is: 20,596.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.83 : 31,708.67 = 13,749.85 : x
  2. Step 2: Convert to fraction form
    21,167.83/31,708.67 = 13,749.85/x
  3. Step 3: Cross multiply
    21,167.83x = 31,708.67 × 13,749.85
  4. Step 4: Simplify right side
    21,167.83x = 435,989,297.66
  5. Step 5: Solve for x
    x = 435,989,297.66/21,167.83
  6. Step 6: Final answer
    x = 20,596.79

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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.