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Finding the Fourth Proportional to 18,956.88, 26,163.18 and 13,669.20

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Solution

The fourth proportional to 18,956.88, 26,163.18 and 13,669.20 is: 18,865.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956.88 : 26,163.18 = 13,669.20 : x
  2. Step 2: Convert to fraction form
    18,956.88/26,163.18 = 13,669.20/x
  3. Step 3: Cross multiply
    18,956.88x = 26,163.18 × 13,669.20
  4. Step 4: Simplify right side
    18,956.88x = 357,629,740.06
  5. Step 5: Solve for x
    x = 357,629,740.06/18,956.88
  6. Step 6: Final answer
    x = 18,865.43

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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.