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Finding the Fourth Proportional to 20,839, 28,752.12 and 11,883.24

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Solution

The fourth proportional to 20,839, 28,752.12 and 11,883.24 is: 16,395.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839 : 28,752.12 = 11,883.24 : x
  2. Step 2: Convert to fraction form
    20,839/28,752.12 = 11,883.24/x
  3. Step 3: Cross multiply
    20,839x = 28,752.12 × 11,883.24
  4. Step 4: Simplify right side
    20,839x = 341,668,342.47
  5. Step 5: Solve for x
    x = 341,668,342.47/20,839
  6. Step 6: Final answer
    x = 16,395.62

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1.5x scale

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.