Home / 18,918.96-28,380.06-5,771.46

Finding the Fourth Proportional to 18,918.96, 28,380.06 and 5,771.46

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Solution

The fourth proportional to 18,918.96, 28,380.06 and 5,771.46 is: 8,657.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.96 : 28,380.06 = 5,771.46 : x
  2. Step 2: Convert to fraction form
    18,918.96/28,380.06 = 5,771.46/x
  3. Step 3: Cross multiply
    18,918.96x = 28,380.06 × 5,771.46
  4. Step 4: Simplify right side
    18,918.96x = 163,794,381.09
  5. Step 5: Solve for x
    x = 163,794,381.09/18,918.96
  6. Step 6: Final answer
    x = 8,657.68

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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.