Home / 20,277.54-30,399.84-7,791.12

Finding the Fourth Proportional to 20,277.54, 30,399.84 and 7,791.12

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Solution

The fourth proportional to 20,277.54, 30,399.84 and 7,791.12 is: 11,680.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,277.54 : 30,399.84 = 7,791.12 : x
  2. Step 2: Convert to fraction form
    20,277.54/30,399.84 = 7,791.12/x
  3. Step 3: Cross multiply
    20,277.54x = 30,399.84 × 7,791.12
  4. Step 4: Simplify right side
    20,277.54x = 236,848,801.42
  5. Step 5: Solve for x
    x = 236,848,801.42/20,277.54
  6. Step 6: Final answer
    x = 11,680.35

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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.