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Finding the Fourth Proportional to 13,615.11, 20,413.94 and 5,722.74

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Solution

The fourth proportional to 13,615.11, 20,413.94 and 5,722.74 is: 8,580.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.11 : 20,413.94 = 5,722.74 : x
  2. Step 2: Convert to fraction form
    13,615.11/20,413.94 = 5,722.74/x
  3. Step 3: Cross multiply
    13,615.11x = 20,413.94 × 5,722.74
  4. Step 4: Simplify right side
    13,615.11x = 116,823,642.38
  5. Step 5: Solve for x
    x = 116,823,642.38/13,615.11
  6. Step 6: Final answer
    x = 8,580.44

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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.