Home / 12,289.82-18,438.64-5,177.82

Finding the Fourth Proportional to 12,289.82, 18,438.64 and 5,177.82

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Solution

The fourth proportional to 12,289.82, 18,438.64 and 5,177.82 is: 7,768.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,289.82 : 18,438.64 = 5,177.82 : x
  2. Step 2: Convert to fraction form
    12,289.82/18,438.64 = 5,177.82/x
  3. Step 3: Cross multiply
    12,289.82x = 18,438.64 × 5,177.82
  4. Step 4: Simplify right side
    12,289.82x = 95,471,958.96
  5. Step 5: Solve for x
    x = 95,471,958.96/12,289.82
  6. Step 6: Final answer
    x = 7,768.38

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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.