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Finding the Fourth Proportional to 18,001.88, 26,956.65 and 12,447.56

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Solution

The fourth proportional to 18,001.88, 26,956.65 and 12,447.56 is: 18,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,001.88 : 26,956.65 = 12,447.56 : x
  2. Step 2: Convert to fraction form
    18,001.88/26,956.65 = 12,447.56/x
  3. Step 3: Cross multiply
    18,001.88x = 26,956.65 × 12,447.56
  4. Step 4: Simplify right side
    18,001.88x = 335,544,518.27
  5. Step 5: Solve for x
    x = 335,544,518.27/18,001.88
  6. Step 6: Final answer
    x = 18,639.42

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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.