Home / 21,223.81-31,791.97-12,432.07

Finding the Fourth Proportional to 21,223.81, 31,791.97 and 12,432.07

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Solution

The fourth proportional to 21,223.81, 31,791.97 and 12,432.07 is: 18,622.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.81 : 31,791.97 = 12,432.07 : x
  2. Step 2: Convert to fraction form
    21,223.81/31,791.97 = 12,432.07/x
  3. Step 3: Cross multiply
    21,223.81x = 31,791.97 × 12,432.07
  4. Step 4: Simplify right side
    21,223.81x = 395,239,934.32
  5. Step 5: Solve for x
    x = 395,239,934.32/21,223.81
  6. Step 6: Final answer
    x = 18,622.48

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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.