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Finding the Fourth Proportional to 20,550.87, 30,645.86 and 20,363.76

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Solution

The fourth proportional to 20,550.87, 30,645.86 and 20,363.76 is: 30,366.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.87 : 30,645.86 = 20,363.76 : x
  2. Step 2: Convert to fraction form
    20,550.87/30,645.86 = 20,363.76/x
  3. Step 3: Cross multiply
    20,550.87x = 30,645.86 × 20,363.76
  4. Step 4: Simplify right side
    20,550.87x = 624,064,836.21
  5. Step 5: Solve for x
    x = 624,064,836.21/20,550.87
  6. Step 6: Final answer
    x = 30,366.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.