Home / 13,108.57-18,091.22-11,478.58

Finding the Fourth Proportional to 13,108.57, 18,091.22 and 11,478.58

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Solution

The fourth proportional to 13,108.57, 18,091.22 and 11,478.58 is: 15,841.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.57 : 18,091.22 = 11,478.58 : x
  2. Step 2: Convert to fraction form
    13,108.57/18,091.22 = 11,478.58/x
  3. Step 3: Cross multiply
    13,108.57x = 18,091.22 × 11,478.58
  4. Step 4: Simplify right side
    13,108.57x = 207,661,413.45
  5. Step 5: Solve for x
    x = 207,661,413.45/13,108.57
  6. Step 6: Final answer
    x = 15,841.66

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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.