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Finding the Fourth Proportional to 18,766.51, 28,149.77 and 13,249.12

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Solution

The fourth proportional to 18,766.51, 28,149.77 and 13,249.12 is: 19,873.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,766.51 : 28,149.77 = 13,249.12 : x
  2. Step 2: Convert to fraction form
    18,766.51/28,149.77 = 13,249.12/x
  3. Step 3: Cross multiply
    18,766.51x = 28,149.77 × 13,249.12
  4. Step 4: Simplify right side
    18,766.51x = 372,959,603.07
  5. Step 5: Solve for x
    x = 372,959,603.07/18,766.51
  6. Step 6: Final answer
    x = 19,873.68

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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.