Home / 20,771.40-28,663.32-11,338.08

Finding the Fourth Proportional to 20,771.40, 28,663.32 and 11,338.08

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Solution

The fourth proportional to 20,771.40, 28,663.32 and 11,338.08 is: 15,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.40 : 28,663.32 = 11,338.08 : x
  2. Step 2: Convert to fraction form
    20,771.40/28,663.32 = 11,338.08/x
  3. Step 3: Cross multiply
    20,771.40x = 28,663.32 × 11,338.08
  4. Step 4: Simplify right side
    20,771.40x = 324,987,015.23
  5. Step 5: Solve for x
    x = 324,987,015.23/20,771.40
  6. Step 6: Final answer
    x = 15,645.89

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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.