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Finding the Fourth Proportional to 10,413.72, 15,636.78 and 8,447.04

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Solution

The fourth proportional to 10,413.72, 15,636.78 and 8,447.04 is: 12,683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,413.72 : 15,636.78 = 8,447.04 : x
  2. Step 2: Convert to fraction form
    10,413.72/15,636.78 = 8,447.04/x
  3. Step 3: Cross multiply
    10,413.72x = 15,636.78 × 8,447.04
  4. Step 4: Simplify right side
    10,413.72x = 132,084,506.13
  5. Step 5: Solve for x
    x = 132,084,506.13/10,413.72
  6. Step 6: Final answer
    x = 12,683.70

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1.5x scale

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.