Home / 20,413.50-28,170.41-11,460.79

Finding the Fourth Proportional to 20,413.50, 28,170.41 and 11,460.79

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Solution

The fourth proportional to 20,413.50, 28,170.41 and 11,460.79 is: 15,815.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,413.50 : 28,170.41 = 11,460.79 : x
  2. Step 2: Convert to fraction form
    20,413.50/28,170.41 = 11,460.79/x
  3. Step 3: Cross multiply
    20,413.50x = 28,170.41 × 11,460.79
  4. Step 4: Simplify right side
    20,413.50x = 322,855,153.22
  5. Step 5: Solve for x
    x = 322,855,153.22/20,413.50
  6. Step 6: Final answer
    x = 15,815.77

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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.