Home / 21,324.80-31,987.20-10,229.60

Finding the Fourth Proportional to 21,324.80, 31,987.20 and 10,229.60

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Solution

The fourth proportional to 21,324.80, 31,987.20 and 10,229.60 is: 15,344.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.80 : 31,987.20 = 10,229.60 : x
  2. Step 2: Convert to fraction form
    21,324.80/31,987.20 = 10,229.60/x
  3. Step 3: Cross multiply
    21,324.80x = 31,987.20 × 10,229.60
  4. Step 4: Simplify right side
    21,324.80x = 327,216,261.12
  5. Step 5: Solve for x
    x = 327,216,261.12/21,324.80
  6. Step 6: Final answer
    x = 15,344.40

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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.