Home / 20,743.74-31,115.72-5,161.36

Finding the Fourth Proportional to 20,743.74, 31,115.72 and 5,161.36

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Solution

The fourth proportional to 20,743.74, 31,115.72 and 5,161.36 is: 7,742.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.74 : 31,115.72 = 5,161.36 : x
  2. Step 2: Convert to fraction form
    20,743.74/31,115.72 = 5,161.36/x
  3. Step 3: Cross multiply
    20,743.74x = 31,115.72 × 5,161.36
  4. Step 4: Simplify right side
    20,743.74x = 160,599,432.58
  5. Step 5: Solve for x
    x = 160,599,432.58/20,743.74
  6. Step 6: Final answer
    x = 7,742.07

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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.