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Finding the Fourth Proportional to 18,802.48, 28,213.02 and 8,939.20

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Solution

The fourth proportional to 18,802.48, 28,213.02 and 8,939.20 is: 13,413.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.48 : 28,213.02 = 8,939.20 : x
  2. Step 2: Convert to fraction form
    18,802.48/28,213.02 = 8,939.20/x
  3. Step 3: Cross multiply
    18,802.48x = 28,213.02 × 8,939.20
  4. Step 4: Simplify right side
    18,802.48x = 252,201,828.38
  5. Step 5: Solve for x
    x = 252,201,828.38/18,802.48
  6. Step 6: Final answer
    x = 13,413.22

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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.