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Finding the Fourth Proportional to 18,911.88, 26,098.18 and 10,413.82

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Solution

The fourth proportional to 18,911.88, 26,098.18 and 10,413.82 is: 14,370.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.88 : 26,098.18 = 10,413.82 : x
  2. Step 2: Convert to fraction form
    18,911.88/26,098.18 = 10,413.82/x
  3. Step 3: Cross multiply
    18,911.88x = 26,098.18 × 10,413.82
  4. Step 4: Simplify right side
    18,911.88x = 271,781,748.85
  5. Step 5: Solve for x
    x = 271,781,748.85/18,911.88
  6. Step 6: Final answer
    x = 14,370.95

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1.5x scale

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.