Home / 31,853.86-43,977.51-21,107.80

Finding the Fourth Proportional to 31,853.86, 43,977.51 and 21,107.80

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Solution

The fourth proportional to 31,853.86, 43,977.51 and 21,107.80 is: 29,141.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,853.86 : 43,977.51 = 21,107.80 : x
  2. Step 2: Convert to fraction form
    31,853.86/43,977.51 = 21,107.80/x
  3. Step 3: Cross multiply
    31,853.86x = 43,977.51 × 21,107.80
  4. Step 4: Simplify right side
    31,853.86x = 928,268,485.58
  5. Step 5: Solve for x
    x = 928,268,485.58/31,853.86
  6. Step 6: Final answer
    x = 29,141.48

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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.