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Finding the Fourth Proportional to 18,431.76, 27,642.78 and 6,745.08

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Solution

The fourth proportional to 18,431.76, 27,642.78 and 6,745.08 is: 10,115.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431.76 : 27,642.78 = 6,745.08 : x
  2. Step 2: Convert to fraction form
    18,431.76/27,642.78 = 6,745.08/x
  3. Step 3: Cross multiply
    18,431.76x = 27,642.78 × 6,745.08
  4. Step 4: Simplify right side
    18,431.76x = 186,452,762.52
  5. Step 5: Solve for x
    x = 186,452,762.52/18,431.76
  6. Step 6: Final answer
    x = 10,115.84

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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.