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Finding the Fourth Proportional to 13,672.26, 18,868.41 and 8,365.50

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Solution

The fourth proportional to 13,672.26, 18,868.41 and 8,365.50 is: 11,544.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.26 : 18,868.41 = 8,365.50 : x
  2. Step 2: Convert to fraction form
    13,672.26/18,868.41 = 8,365.50/x
  3. Step 3: Cross multiply
    13,672.26x = 18,868.41 × 8,365.50
  4. Step 4: Simplify right side
    13,672.26x = 157,843,683.86
  5. Step 5: Solve for x
    x = 157,843,683.86/13,672.26
  6. Step 6: Final answer
    x = 11,544.81

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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.