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Finding the Fourth Proportional to 18,991.98, 28,487.16 and 5,843.79

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Solution

The fourth proportional to 18,991.98, 28,487.16 and 5,843.79 is: 8,765.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.98 : 28,487.16 = 5,843.79 : x
  2. Step 2: Convert to fraction form
    18,991.98/28,487.16 = 5,843.79/x
  3. Step 3: Cross multiply
    18,991.98x = 28,487.16 × 5,843.79
  4. Step 4: Simplify right side
    18,991.98x = 166,472,980.74
  5. Step 5: Solve for x
    x = 166,472,980.74/18,991.98
  6. Step 6: Final answer
    x = 8,765.44

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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.