Home / 20,968.12-31,419.24-9,872.20

Finding the Fourth Proportional to 20,968.12, 31,419.24 and 9,872.20

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Solution

The fourth proportional to 20,968.12, 31,419.24 and 9,872.20 is: 14,792.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.12 : 31,419.24 = 9,872.20 : x
  2. Step 2: Convert to fraction form
    20,968.12/31,419.24 = 9,872.20/x
  3. Step 3: Cross multiply
    20,968.12x = 31,419.24 × 9,872.20
  4. Step 4: Simplify right side
    20,968.12x = 310,177,021.13
  5. Step 5: Solve for x
    x = 310,177,021.13/20,968.12
  6. Step 6: Final answer
    x = 14,792.79

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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.