Home / 20,728.74-31,239.06-18,757.02

Finding the Fourth Proportional to 20,728.74, 31,239.06 and 18,757.02

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Solution

The fourth proportional to 20,728.74, 31,239.06 and 18,757.02 is: 28,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.74 : 31,239.06 = 18,757.02 : x
  2. Step 2: Convert to fraction form
    20,728.74/31,239.06 = 18,757.02/x
  3. Step 3: Cross multiply
    20,728.74x = 31,239.06 × 18,757.02
  4. Step 4: Simplify right side
    20,728.74x = 585,951,673.20
  5. Step 5: Solve for x
    x = 585,951,673.20/20,728.74
  6. Step 6: Final answer
    x = 28,267.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.