Home / 20,809.18-31,186.56-18,170.02

Finding the Fourth Proportional to 20,809.18, 31,186.56 and 18,170.02

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Solution

The fourth proportional to 20,809.18, 31,186.56 and 18,170.02 is: 27,231.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.18 : 31,186.56 = 18,170.02 : x
  2. Step 2: Convert to fraction form
    20,809.18/31,186.56 = 18,170.02/x
  3. Step 3: Cross multiply
    20,809.18x = 31,186.56 × 18,170.02
  4. Step 4: Simplify right side
    20,809.18x = 566,660,418.93
  5. Step 5: Solve for x
    x = 566,660,418.93/20,809.18
  6. Step 6: Final answer
    x = 27,231.27

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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.