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Finding the Fourth Proportional to 18,911.76, 26,098.02 and 10,413.72

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Solution

The fourth proportional to 18,911.76, 26,098.02 and 10,413.72 is: 14,370.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.76 : 26,098.02 = 10,413.72 : x
  2. Step 2: Convert to fraction form
    18,911.76/26,098.02 = 10,413.72/x
  3. Step 3: Cross multiply
    18,911.76x = 26,098.02 × 10,413.72
  4. Step 4: Simplify right side
    18,911.76x = 271,777,472.83
  5. Step 5: Solve for x
    x = 271,777,472.83/18,911.76
  6. Step 6: Final answer
    x = 14,370.82

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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.