Home / 20,172.88-30,287.40-10,318.96

Finding the Fourth Proportional to 20,172.88, 30,287.40 and 10,318.96

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Solution

The fourth proportional to 20,172.88, 30,287.40 and 10,318.96 is: 15,492.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.88 : 30,287.40 = 10,318.96 : x
  2. Step 2: Convert to fraction form
    20,172.88/30,287.40 = 10,318.96/x
  3. Step 3: Cross multiply
    20,172.88x = 30,287.40 × 10,318.96
  4. Step 4: Simplify right side
    20,172.88x = 312,534,469.10
  5. Step 5: Solve for x
    x = 312,534,469.10/20,172.88
  6. Step 6: Final answer
    x = 15,492.80

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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.