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Finding the Fourth Proportional to 13,672.50, 18,863.73 and 8,364.66

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Solution

The fourth proportional to 13,672.50, 18,863.73 and 8,364.66 is: 11,540.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.50 : 18,863.73 = 8,364.66 : x
  2. Step 2: Convert to fraction form
    13,672.50/18,863.73 = 8,364.66/x
  3. Step 3: Cross multiply
    13,672.50x = 18,863.73 × 8,364.66
  4. Step 4: Simplify right side
    13,672.50x = 157,788,687.78
  5. Step 5: Solve for x
    x = 157,788,687.78/13,672.50
  6. Step 6: Final answer
    x = 11,540.59

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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.