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Finding the Fourth Proportional to 20,793.69, 31,192.56 and 19,672.65

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Solution

The fourth proportional to 20,793.69, 31,192.56 and 19,672.65 is: 29,510.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.69 : 31,192.56 = 19,672.65 : x
  2. Step 2: Convert to fraction form
    20,793.69/31,192.56 = 19,672.65/x
  3. Step 3: Cross multiply
    20,793.69x = 31,192.56 × 19,672.65
  4. Step 4: Simplify right side
    20,793.69x = 613,640,315.48
  5. Step 5: Solve for x
    x = 613,640,315.48/20,793.69
  6. Step 6: Final answer
    x = 29,510.89

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1.5x scale

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.