Home / 31,852.86-43,976.13-21,106.80

Finding the Fourth Proportional to 31,852.86, 43,976.13 and 21,106.80

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Solution

The fourth proportional to 31,852.86, 43,976.13 and 21,106.80 is: 29,140.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,852.86 : 43,976.13 = 21,106.80 : x
  2. Step 2: Convert to fraction form
    31,852.86/43,976.13 = 21,106.80/x
  3. Step 3: Cross multiply
    31,852.86x = 43,976.13 × 21,106.80
  4. Step 4: Simplify right side
    31,852.86x = 928,195,380.68
  5. Step 5: Solve for x
    x = 928,195,380.68/31,852.86
  6. Step 6: Final answer
    x = 29,140.10

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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.