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Finding the Fourth Proportional to 13,641.94, 18,824.97 and 8,335.90

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Solution

The fourth proportional to 13,641.94, 18,824.97 and 8,335.90 is: 11,502.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,641.94 : 18,824.97 = 8,335.90 : x
  2. Step 2: Convert to fraction form
    13,641.94/18,824.97 = 8,335.90/x
  3. Step 3: Cross multiply
    13,641.94x = 18,824.97 × 8,335.90
  4. Step 4: Simplify right side
    13,641.94x = 156,923,067.42
  5. Step 5: Solve for x
    x = 156,923,067.42/13,641.94
  6. Step 6: Final answer
    x = 11,502.99

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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.