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Finding the Fourth Proportional to 21,636.76, 29,860.14 and 12,204.76

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Solution

The fourth proportional to 21,636.76, 29,860.14 and 12,204.76 is: 16,843.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,636.76 : 29,860.14 = 12,204.76 : x
  2. Step 2: Convert to fraction form
    21,636.76/29,860.14 = 12,204.76/x
  3. Step 3: Cross multiply
    21,636.76x = 29,860.14 × 12,204.76
  4. Step 4: Simplify right side
    21,636.76x = 364,435,842.27
  5. Step 5: Solve for x
    x = 364,435,842.27/21,636.76
  6. Step 6: Final answer
    x = 16,843.36

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Half scale
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Double scale
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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.