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Finding the Fourth Proportional to 20,651.97, 28,497.29 and 12,152.22

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Solution

The fourth proportional to 20,651.97, 28,497.29 and 12,152.22 is: 16,768.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.97 : 28,497.29 = 12,152.22 : x
  2. Step 2: Convert to fraction form
    20,651.97/28,497.29 = 12,152.22/x
  3. Step 3: Cross multiply
    20,651.97x = 28,497.29 × 12,152.22
  4. Step 4: Simplify right side
    20,651.97x = 346,305,276.72
  5. Step 5: Solve for x
    x = 346,305,276.72/20,651.97
  6. Step 6: Final answer
    x = 16,768.63

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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.