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Finding the Fourth Proportional to 20,963.52, 28,932 and 12,012

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Solution

The fourth proportional to 20,963.52, 28,932 and 12,012 is: 16,577.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.52 : 28,932 = 12,012 : x
  2. Step 2: Convert to fraction form
    20,963.52/28,932 = 12,012/x
  3. Step 3: Cross multiply
    20,963.52x = 28,932 × 12,012
  4. Step 4: Simplify right side
    20,963.52x = 347,531,184
  5. Step 5: Solve for x
    x = 347,531,184/20,963.52
  6. Step 6: Final answer
    x = 16,577.90

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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.