Home / 18,770.40-28,164.96-8,379.36

Finding the Fourth Proportional to 18,770.40, 28,164.96 and 8,379.36

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Solution

The fourth proportional to 18,770.40, 28,164.96 and 8,379.36 is: 12,573.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.40 : 28,164.96 = 8,379.36 : x
  2. Step 2: Convert to fraction form
    18,770.40/28,164.96 = 8,379.36/x
  3. Step 3: Cross multiply
    18,770.40x = 28,164.96 × 8,379.36
  4. Step 4: Simplify right side
    18,770.40x = 236,004,339.23
  5. Step 5: Solve for x
    x = 236,004,339.23/18,770.40
  6. Step 6: Final answer
    x = 12,573.22

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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.