Home / 31,468.72-43,413.09-20,699.77

Finding the Fourth Proportional to 31,468.72, 43,413.09 and 20,699.77

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Solution

The fourth proportional to 31,468.72, 43,413.09 and 20,699.77 is: 28,556.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,468.72 : 43,413.09 = 20,699.77 : x
  2. Step 2: Convert to fraction form
    31,468.72/43,413.09 = 20,699.77/x
  3. Step 3: Cross multiply
    31,468.72x = 43,413.09 × 20,699.77
  4. Step 4: Simplify right side
    31,468.72x = 898,640,977.99
  5. Step 5: Solve for x
    x = 898,640,977.99/31,468.72
  6. Step 6: Final answer
    x = 28,556.64

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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.