Home / 20,742.73-31,114.20-5,160.35

Finding the Fourth Proportional to 20,742.73, 31,114.20 and 5,160.35

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Solution

The fourth proportional to 20,742.73, 31,114.20 and 5,160.35 is: 7,740.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.73 : 31,114.20 = 5,160.35 : x
  2. Step 2: Convert to fraction form
    20,742.73/31,114.20 = 5,160.35/x
  3. Step 3: Cross multiply
    20,742.73x = 31,114.20 × 5,160.35
  4. Step 4: Simplify right side
    20,742.73x = 160,560,161.97
  5. Step 5: Solve for x
    x = 160,560,161.97/20,742.73
  6. Step 6: Final answer
    x = 7,740.55

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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.