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Finding the Fourth Proportional to 18,323.78, 27,486.77 and 5,177.12

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Solution

The fourth proportional to 18,323.78, 27,486.77 and 5,177.12 is: 7,765.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,323.78 : 27,486.77 = 5,177.12 : x
  2. Step 2: Convert to fraction form
    18,323.78/27,486.77 = 5,177.12/x
  3. Step 3: Cross multiply
    18,323.78x = 27,486.77 × 5,177.12
  4. Step 4: Simplify right side
    18,323.78x = 142,302,143.38
  5. Step 5: Solve for x
    x = 142,302,143.38/18,323.78
  6. Step 6: Final answer
    x = 7,765.98

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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.