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Finding the Fourth Proportional to 17,761.80, 26,618.40 and 11,821.80

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Solution

The fourth proportional to 17,761.80, 26,618.40 and 11,821.80 is: 17,716.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,761.80 : 26,618.40 = 11,821.80 : x
  2. Step 2: Convert to fraction form
    17,761.80/26,618.40 = 11,821.80/x
  3. Step 3: Cross multiply
    17,761.80x = 26,618.40 × 11,821.80
  4. Step 4: Simplify right side
    17,761.80x = 314,677,401.12
  5. Step 5: Solve for x
    x = 314,677,401.12/17,761.80
  6. Step 6: Final answer
    x = 17,716.53

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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.