Home / 21,945.19-32,917.79-12,079.39

Finding the Fourth Proportional to 21,945.19, 32,917.79 and 12,079.39

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Solution

The fourth proportional to 21,945.19, 32,917.79 and 12,079.39 is: 18,119.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945.19 : 32,917.79 = 12,079.39 : x
  2. Step 2: Convert to fraction form
    21,945.19/32,917.79 = 12,079.39/x
  3. Step 3: Cross multiply
    21,945.19x = 32,917.79 × 12,079.39
  4. Step 4: Simplify right side
    21,945.19x = 397,626,823.35
  5. Step 5: Solve for x
    x = 397,626,823.35/21,945.19
  6. Step 6: Final answer
    x = 18,119.09

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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.