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Finding the Fourth Proportional to 18,804.72, 28,188.24 and 10,488.48

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Solution

The fourth proportional to 18,804.72, 28,188.24 and 10,488.48 is: 15,722.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.72 : 28,188.24 = 10,488.48 : x
  2. Step 2: Convert to fraction form
    18,804.72/28,188.24 = 10,488.48/x
  3. Step 3: Cross multiply
    18,804.72x = 28,188.24 × 10,488.48
  4. Step 4: Simplify right side
    18,804.72x = 295,651,791.48
  5. Step 5: Solve for x
    x = 295,651,791.48/18,804.72
  6. Step 6: Final answer
    x = 15,722.21

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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.