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Finding the Fourth Proportional to 14,989.50, 20,685.84 and 8,275.11

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Solution

The fourth proportional to 14,989.50, 20,685.84 and 8,275.11 is: 11,419.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.50 : 20,685.84 = 8,275.11 : x
  2. Step 2: Convert to fraction form
    14,989.50/20,685.84 = 8,275.11/x
  3. Step 3: Cross multiply
    14,989.50x = 20,685.84 × 8,275.11
  4. Step 4: Simplify right side
    14,989.50x = 171,177,601.44
  5. Step 5: Solve for x
    x = 171,177,601.44/14,989.50
  6. Step 6: Final answer
    x = 11,419.83

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