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Finding the Fourth Proportional to 13,993.56, 20,968.34 and 12,799.22

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Solution

The fourth proportional to 13,993.56, 20,968.34 and 12,799.22 is: 19,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,993.56 : 20,968.34 = 12,799.22 : x
  2. Step 2: Convert to fraction form
    13,993.56/20,968.34 = 12,799.22/x
  3. Step 3: Cross multiply
    13,993.56x = 20,968.34 × 12,799.22
  4. Step 4: Simplify right side
    13,993.56x = 268,378,227.86
  5. Step 5: Solve for x
    x = 268,378,227.86/13,993.56
  6. Step 6: Final answer
    x = 19,178.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.