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Finding the Fourth Proportional to 20,651.95, 30,960.51 and 8,956.36

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Solution

The fourth proportional to 20,651.95, 30,960.51 and 8,956.36 is: 13,426.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.95 : 30,960.51 = 8,956.36 : x
  2. Step 2: Convert to fraction form
    20,651.95/30,960.51 = 8,956.36/x
  3. Step 3: Cross multiply
    20,651.95x = 30,960.51 × 8,956.36
  4. Step 4: Simplify right side
    20,651.95x = 277,293,473.34
  5. Step 5: Solve for x
    x = 277,293,473.34/20,651.95
  6. Step 6: Final answer
    x = 13,426.99

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