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Finding the Fourth Proportional to 11,987.90, 17,893.08 and 11,249.18

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Solution

The fourth proportional to 11,987.90, 17,893.08 and 11,249.18 is: 16,790.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.90 : 17,893.08 = 11,249.18 : x
  2. Step 2: Convert to fraction form
    11,987.90/17,893.08 = 11,249.18/x
  3. Step 3: Cross multiply
    11,987.90x = 17,893.08 × 11,249.18
  4. Step 4: Simplify right side
    11,987.90x = 201,282,477.67
  5. Step 5: Solve for x
    x = 201,282,477.67/11,987.90
  6. Step 6: Final answer
    x = 16,790.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.