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Finding the Fourth Proportional to 18,745.32, 28,124.14 and 7,661.33

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Solution

The fourth proportional to 18,745.32, 28,124.14 and 7,661.33 is: 11,494.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.32 : 28,124.14 = 7,661.33 : x
  2. Step 2: Convert to fraction form
    18,745.32/28,124.14 = 7,661.33/x
  3. Step 3: Cross multiply
    18,745.32x = 28,124.14 × 7,661.33
  4. Step 4: Simplify right side
    18,745.32x = 215,468,414.21
  5. Step 5: Solve for x
    x = 215,468,414.21/18,745.32
  6. Step 6: Final answer
    x = 11,494.52

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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.