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Finding the Fourth Proportional to 15,089.19, 20,824.08 and 8,716.05

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Solution

The fourth proportional to 15,089.19, 20,824.08 and 8,716.05 is: 12,028.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,089.19 : 20,824.08 = 8,716.05 : x
  2. Step 2: Convert to fraction form
    15,089.19/20,824.08 = 8,716.05/x
  3. Step 3: Cross multiply
    15,089.19x = 20,824.08 × 8,716.05
  4. Step 4: Simplify right side
    15,089.19x = 181,503,761.53
  5. Step 5: Solve for x
    x = 181,503,761.53/15,089.19
  6. Step 6: Final answer
    x = 12,028.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.