Home / 13,615.70-20,413.94-5,288.78

Finding the Fourth Proportional to 13,615.70, 20,413.94 and 5,288.78

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Solution

The fourth proportional to 13,615.70, 20,413.94 and 5,288.78 is: 7,929.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.70 : 20,413.94 = 5,288.78 : x
  2. Step 2: Convert to fraction form
    13,615.70/20,413.94 = 5,288.78/x
  3. Step 3: Cross multiply
    13,615.70x = 20,413.94 × 5,288.78
  4. Step 4: Simplify right side
    13,615.70x = 107,964,837.59
  5. Step 5: Solve for x
    x = 107,964,837.59/13,615.70
  6. Step 6: Final answer
    x = 7,929.44

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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.