Home / 31,413.52-43,362.06-20,806.60

Finding the Fourth Proportional to 31,413.52, 43,362.06 and 20,806.60

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Solution

The fourth proportional to 31,413.52, 43,362.06 and 20,806.60 is: 28,720.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,413.52 : 43,362.06 = 20,806.60 : x
  2. Step 2: Convert to fraction form
    31,413.52/43,362.06 = 20,806.60/x
  3. Step 3: Cross multiply
    31,413.52x = 43,362.06 × 20,806.60
  4. Step 4: Simplify right side
    31,413.52x = 902,217,037.60
  5. Step 5: Solve for x
    x = 902,217,037.60/31,413.52
  6. Step 6: Final answer
    x = 28,720.66

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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.