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Finding the Fourth Proportional to 18,809.87, 28,214.73 and 7,716.62

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Solution

The fourth proportional to 18,809.87, 28,214.73 and 7,716.62 is: 11,574.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.87 : 28,214.73 = 7,716.62 : x
  2. Step 2: Convert to fraction form
    18,809.87/28,214.73 = 7,716.62/x
  3. Step 3: Cross multiply
    18,809.87x = 28,214.73 × 7,716.62
  4. Step 4: Simplify right side
    18,809.87x = 217,722,261.64
  5. Step 5: Solve for x
    x = 217,722,261.64/18,809.87
  6. Step 6: Final answer
    x = 11,574.89

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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.