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Finding the Fourth Proportional to 14,989.97, 20,689.18 and 8,621.01

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Solution

The fourth proportional to 14,989.97, 20,689.18 and 8,621.01 is: 11,898.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.97 : 20,689.18 = 8,621.01 : x
  2. Step 2: Convert to fraction form
    14,989.97/20,689.18 = 8,621.01/x
  3. Step 3: Cross multiply
    14,989.97x = 20,689.18 × 8,621.01
  4. Step 4: Simplify right side
    14,989.97x = 178,361,627.67
  5. Step 5: Solve for x
    x = 178,361,627.67/14,989.97
  6. Step 6: Final answer
    x = 11,898.73

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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.