Home / 20,743.98-31,115.93-5,161.61

Finding the Fourth Proportional to 20,743.98, 31,115.93 and 5,161.61

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Solution

The fourth proportional to 20,743.98, 31,115.93 and 5,161.61 is: 7,742.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.98 : 31,115.93 = 5,161.61 : x
  2. Step 2: Convert to fraction form
    20,743.98/31,115.93 = 5,161.61/x
  3. Step 3: Cross multiply
    20,743.98x = 31,115.93 × 5,161.61
  4. Step 4: Simplify right side
    20,743.98x = 160,608,114.06
  5. Step 5: Solve for x
    x = 160,608,114.06/20,743.98
  6. Step 6: Final answer
    x = 7,742.40

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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.