Home / 21,555.38-32,305.05-12,067.31

Finding the Fourth Proportional to 21,555.38, 32,305.05 and 12,067.31

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Solution

The fourth proportional to 21,555.38, 32,305.05 and 12,067.31 is: 18,085.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.38 : 32,305.05 = 12,067.31 : x
  2. Step 2: Convert to fraction form
    21,555.38/32,305.05 = 12,067.31/x
  3. Step 3: Cross multiply
    21,555.38x = 32,305.05 × 12,067.31
  4. Step 4: Simplify right side
    21,555.38x = 389,835,133.68
  5. Step 5: Solve for x
    x = 389,835,133.68/21,555.38
  6. Step 6: Final answer
    x = 18,085.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.