Home / 20,939.16-28,894.36-11,984.61

Finding the Fourth Proportional to 20,939.16, 28,894.36 and 11,984.61

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Solution

The fourth proportional to 20,939.16, 28,894.36 and 11,984.61 is: 16,537.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.16 : 28,894.36 = 11,984.61 : x
  2. Step 2: Convert to fraction form
    20,939.16/28,894.36 = 11,984.61/x
  3. Step 3: Cross multiply
    20,939.16x = 28,894.36 × 11,984.61
  4. Step 4: Simplify right side
    20,939.16x = 346,287,635.80
  5. Step 5: Solve for x
    x = 346,287,635.80/20,939.16
  6. Step 6: Final answer
    x = 16,537.80

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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.