Home / 21,132.20-31,680.46-13,323.80

Finding the Fourth Proportional to 21,132.20, 31,680.46 and 13,323.80

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Solution

The fourth proportional to 21,132.20, 31,680.46 and 13,323.80 is: 19,974.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.20 : 31,680.46 = 13,323.80 : x
  2. Step 2: Convert to fraction form
    21,132.20/31,680.46 = 13,323.80/x
  3. Step 3: Cross multiply
    21,132.20x = 31,680.46 × 13,323.80
  4. Step 4: Simplify right side
    21,132.20x = 422,104,112.95
  5. Step 5: Solve for x
    x = 422,104,112.95/21,132.20
  6. Step 6: Final answer
    x = 19,974.45

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1.5x scale

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.