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Finding the Fourth Proportional to 13,620.95, 18,794.51 and 8,317.48

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Solution

The fourth proportional to 13,620.95, 18,794.51 and 8,317.48 is: 11,476.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.95 : 18,794.51 = 8,317.48 : x
  2. Step 2: Convert to fraction form
    13,620.95/18,794.51 = 8,317.48/x
  3. Step 3: Cross multiply
    13,620.95x = 18,794.51 × 8,317.48
  4. Step 4: Simplify right side
    13,620.95x = 156,322,872.46
  5. Step 5: Solve for x
    x = 156,322,872.46/13,620.95
  6. Step 6: Final answer
    x = 11,476.65

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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.