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Finding the Fourth Proportional to 29,137.87, 40,209.87 and 16,390.09

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Solution

The fourth proportional to 29,137.87, 40,209.87 and 16,390.09 is: 22,618.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,137.87 : 40,209.87 = 16,390.09 : x
  2. Step 2: Convert to fraction form
    29,137.87/40,209.87 = 16,390.09/x
  3. Step 3: Cross multiply
    29,137.87x = 40,209.87 × 16,390.09
  4. Step 4: Simplify right side
    29,137.87x = 659,043,388.19
  5. Step 5: Solve for x
    x = 659,043,388.19/29,137.87
  6. Step 6: Final answer
    x = 22,618.10

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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.