Home / 20,770.17-28,662.44-11,338.80

Finding the Fourth Proportional to 20,770.17, 28,662.44 and 11,338.80

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Solution

The fourth proportional to 20,770.17, 28,662.44 and 11,338.80 is: 15,647.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.17 : 28,662.44 = 11,338.80 : x
  2. Step 2: Convert to fraction form
    20,770.17/28,662.44 = 11,338.80/x
  3. Step 3: Cross multiply
    20,770.17x = 28,662.44 × 11,338.80
  4. Step 4: Simplify right side
    20,770.17x = 324,997,617.98
  5. Step 5: Solve for x
    x = 324,997,617.98/20,770.17
  6. Step 6: Final answer
    x = 15,647.33

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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.