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Finding the Fourth Proportional to 13,766.70, 18,998.43 and 8,100.42

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Solution

The fourth proportional to 13,766.70, 18,998.43 and 8,100.42 is: 11,178.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,766.70 : 18,998.43 = 8,100.42 : x
  2. Step 2: Convert to fraction form
    13,766.70/18,998.43 = 8,100.42/x
  3. Step 3: Cross multiply
    13,766.70x = 18,998.43 × 8,100.42
  4. Step 4: Simplify right side
    13,766.70x = 153,895,262.34
  5. Step 5: Solve for x
    x = 153,895,262.34/13,766.70
  6. Step 6: Final answer
    x = 11,178.81

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1.5x scale

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.