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Finding the Fourth Proportional to 20,745, 28,628.82 and 11,792.88

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Solution

The fourth proportional to 20,745, 28,628.82 and 11,792.88 is: 16,274.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745 : 28,628.82 = 11,792.88 : x
  2. Step 2: Convert to fraction form
    20,745/28,628.82 = 11,792.88/x
  3. Step 3: Cross multiply
    20,745x = 28,628.82 × 11,792.88
  4. Step 4: Simplify right side
    20,745x = 337,616,238.80
  5. Step 5: Solve for x
    x = 337,616,238.80/20,745
  6. Step 6: Final answer
    x = 16,274.58

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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.