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Finding the Fourth Proportional to 17,808.88, 26,716.20 and 7,421.68

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Solution

The fourth proportional to 17,808.88, 26,716.20 and 7,421.68 is: 11,133.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,808.88 : 26,716.20 = 7,421.68 : x
  2. Step 2: Convert to fraction form
    17,808.88/26,716.20 = 7,421.68/x
  3. Step 3: Cross multiply
    17,808.88x = 26,716.20 × 7,421.68
  4. Step 4: Simplify right side
    17,808.88x = 198,279,087.22
  5. Step 5: Solve for x
    x = 198,279,087.22/17,808.88
  6. Step 6: Final answer
    x = 11,133.72

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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.