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Finding the Fourth Proportional to 12,618.75, 18,993.92 and 10,716.06

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Solution

The fourth proportional to 12,618.75, 18,993.92 and 10,716.06 is: 16,129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.75 : 18,993.92 = 10,716.06 : x
  2. Step 2: Convert to fraction form
    12,618.75/18,993.92 = 10,716.06/x
  3. Step 3: Cross multiply
    12,618.75x = 18,993.92 × 10,716.06
  4. Step 4: Simplify right side
    12,618.75x = 203,539,986.36
  5. Step 5: Solve for x
    x = 203,539,986.36/12,618.75
  6. Step 6: Final answer
    x = 16,129.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.