Home / 20,221.54-30,330.81-7,742.68

Finding the Fourth Proportional to 20,221.54, 30,330.81 and 7,742.68

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Solution

The fourth proportional to 20,221.54, 30,330.81 and 7,742.68 is: 11,613.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.54 : 30,330.81 = 7,742.68 : x
  2. Step 2: Convert to fraction form
    20,221.54/30,330.81 = 7,742.68/x
  3. Step 3: Cross multiply
    20,221.54x = 30,330.81 × 7,742.68
  4. Step 4: Simplify right side
    20,221.54x = 234,841,755.97
  5. Step 5: Solve for x
    x = 234,841,755.97/20,221.54
  6. Step 6: Final answer
    x = 11,613.45

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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.