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Finding the Fourth Proportional to 21,137.01, 29,169.95 and 11,705.58

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Solution

The fourth proportional to 21,137.01, 29,169.95 and 11,705.58 is: 16,154.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.01 : 29,169.95 = 11,705.58 : x
  2. Step 2: Convert to fraction form
    21,137.01/29,169.95 = 11,705.58/x
  3. Step 3: Cross multiply
    21,137.01x = 29,169.95 × 11,705.58
  4. Step 4: Simplify right side
    21,137.01x = 341,451,183.32
  5. Step 5: Solve for x
    x = 341,451,183.32/21,137.01
  6. Step 6: Final answer
    x = 16,154.19

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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.