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Finding the Fourth Proportional to 17,781.58, 26,669.13 and 7,919.02

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Solution

The fourth proportional to 17,781.58, 26,669.13 and 7,919.02 is: 11,877.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,781.58 : 26,669.13 = 7,919.02 : x
  2. Step 2: Convert to fraction form
    17,781.58/26,669.13 = 7,919.02/x
  3. Step 3: Cross multiply
    17,781.58x = 26,669.13 × 7,919.02
  4. Step 4: Simplify right side
    17,781.58x = 211,193,373.85
  5. Step 5: Solve for x
    x = 211,193,373.85/17,781.58
  6. Step 6: Final answer
    x = 11,877.09

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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.