Home / 20,770.06-28,662.78-11,338.70

Finding the Fourth Proportional to 20,770.06, 28,662.78 and 11,338.70

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Solution

The fourth proportional to 20,770.06, 28,662.78 and 11,338.70 is: 15,647.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.06 : 28,662.78 = 11,338.70 : x
  2. Step 2: Convert to fraction form
    20,770.06/28,662.78 = 11,338.70/x
  3. Step 3: Cross multiply
    20,770.06x = 28,662.78 × 11,338.70
  4. Step 4: Simplify right side
    20,770.06x = 324,998,663.59
  5. Step 5: Solve for x
    x = 324,998,663.59/20,770.06
  6. Step 6: Final answer
    x = 15,647.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.