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Finding the Fourth Proportional to 20,451.56, 30,677.94 and 5,661.56

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Solution

The fourth proportional to 20,451.56, 30,677.94 and 5,661.56 is: 8,492.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.56 : 30,677.94 = 5,661.56 : x
  2. Step 2: Convert to fraction form
    20,451.56/30,677.94 = 5,661.56/x
  3. Step 3: Cross multiply
    20,451.56x = 30,677.94 × 5,661.56
  4. Step 4: Simplify right side
    20,451.56x = 173,685,074.68
  5. Step 5: Solve for x
    x = 173,685,074.68/20,451.56
  6. Step 6: Final answer
    x = 8,492.51

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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.