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Finding the Fourth Proportional to 18,804.35, 28,202.87 and 7,118.48

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Solution

The fourth proportional to 18,804.35, 28,202.87 and 7,118.48 is: 10,676.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.35 : 28,202.87 = 7,118.48 : x
  2. Step 2: Convert to fraction form
    18,804.35/28,202.87 = 7,118.48/x
  3. Step 3: Cross multiply
    18,804.35x = 28,202.87 × 7,118.48
  4. Step 4: Simplify right side
    18,804.35x = 200,761,566.04
  5. Step 5: Solve for x
    x = 200,761,566.04/18,804.35
  6. Step 6: Final answer
    x = 10,676.34

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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.