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Finding the Fourth Proportional to 18,517.43, 27,775.51 and 7,421.14

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Solution

The fourth proportional to 18,517.43, 27,775.51 and 7,421.14 is: 11,131.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,517.43 : 27,775.51 = 7,421.14 : x
  2. Step 2: Convert to fraction form
    18,517.43/27,775.51 = 7,421.14/x
  3. Step 3: Cross multiply
    18,517.43x = 27,775.51 × 7,421.14
  4. Step 4: Simplify right side
    18,517.43x = 206,125,860.29
  5. Step 5: Solve for x
    x = 206,125,860.29/18,517.43
  6. Step 6: Final answer
    x = 11,131.45

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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.