Home / 31,486.16-43,462.68-20,879.36

Finding the Fourth Proportional to 31,486.16, 43,462.68 and 20,879.36

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Solution

The fourth proportional to 31,486.16, 43,462.68 and 20,879.36 is: 28,821.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,486.16 : 43,462.68 = 20,879.36 : x
  2. Step 2: Convert to fraction form
    31,486.16/43,462.68 = 20,879.36/x
  3. Step 3: Cross multiply
    31,486.16x = 43,462.68 × 20,879.36
  4. Step 4: Simplify right side
    31,486.16x = 907,472,942.28
  5. Step 5: Solve for x
    x = 907,472,942.28/31,486.16
  6. Step 6: Final answer
    x = 28,821.33

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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.