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Finding the Fourth Proportional to 16,989.42, 25,470.90 and 8,100.12

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Solution

The fourth proportional to 16,989.42, 25,470.90 and 8,100.12 is: 12,143.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,989.42 : 25,470.90 = 8,100.12 : x
  2. Step 2: Convert to fraction form
    16,989.42/25,470.90 = 8,100.12/x
  3. Step 3: Cross multiply
    16,989.42x = 25,470.90 × 8,100.12
  4. Step 4: Simplify right side
    16,989.42x = 206,317,346.51
  5. Step 5: Solve for x
    x = 206,317,346.51/16,989.42
  6. Step 6: Final answer
    x = 12,143.87

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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.