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Finding the Fourth Proportional to 15,413.92, 21,272.15 and 8,697.11

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Solution

The fourth proportional to 15,413.92, 21,272.15 and 8,697.11 is: 12,002.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,413.92 : 21,272.15 = 8,697.11 : x
  2. Step 2: Convert to fraction form
    15,413.92/21,272.15 = 8,697.11/x
  3. Step 3: Cross multiply
    15,413.92x = 21,272.15 × 8,697.11
  4. Step 4: Simplify right side
    15,413.92x = 185,006,143.87
  5. Step 5: Solve for x
    x = 185,006,143.87/15,413.92
  6. Step 6: Final answer
    x = 12,002.54

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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.