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Finding the Fourth Proportional to 17,677.85, 24,395.20 and 9,720

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Solution

The fourth proportional to 17,677.85, 24,395.20 and 9,720 is: 13,413.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,677.85 : 24,395.20 = 9,720 : x
  2. Step 2: Convert to fraction form
    17,677.85/24,395.20 = 9,720/x
  3. Step 3: Cross multiply
    17,677.85x = 24,395.20 × 9,720
  4. Step 4: Simplify right side
    17,677.85x = 237,121,319.70
  5. Step 5: Solve for x
    x = 237,121,319.70/17,677.85
  6. Step 6: Final answer
    x = 13,413.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.