Home / 20,906.80-31,360.02-5,324.40

Finding the Fourth Proportional to 20,906.80, 31,360.02 and 5,324.40

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Solution

The fourth proportional to 20,906.80, 31,360.02 and 5,324.40 is: 7,986.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.80 : 31,360.02 = 5,324.40 : x
  2. Step 2: Convert to fraction form
    20,906.80/31,360.02 = 5,324.40/x
  3. Step 3: Cross multiply
    20,906.80x = 31,360.02 × 5,324.40
  4. Step 4: Simplify right side
    20,906.80x = 166,973,290.49
  5. Step 5: Solve for x
    x = 166,973,290.49/20,906.80
  6. Step 6: Final answer
    x = 7,986.55

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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.