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Finding the Fourth Proportional to 28,489.87, 39,285.84 and 19,550.44

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Solution

The fourth proportional to 28,489.87, 39,285.84 and 19,550.44 is: 26,958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.87 : 39,285.84 = 19,550.44 : x
  2. Step 2: Convert to fraction form
    28,489.87/39,285.84 = 19,550.44/x
  3. Step 3: Cross multiply
    28,489.87x = 39,285.84 × 19,550.44
  4. Step 4: Simplify right side
    28,489.87x = 768,055,457.77
  5. Step 5: Solve for x
    x = 768,055,457.77/28,489.87
  6. Step 6: Final answer
    x = 26,958.90

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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.