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Finding the Fourth Proportional to 29,340.81, 40,489.95 and 16,419.90

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Solution

The fourth proportional to 29,340.81, 40,489.95 and 16,419.90 is: 22,659.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,340.81 : 40,489.95 = 16,419.90 : x
  2. Step 2: Convert to fraction form
    29,340.81/40,489.95 = 16,419.90/x
  3. Step 3: Cross multiply
    29,340.81x = 40,489.95 × 16,419.90
  4. Step 4: Simplify right side
    29,340.81x = 664,840,930.01
  5. Step 5: Solve for x
    x = 664,840,930.01/29,340.81
  6. Step 6: Final answer
    x = 22,659.26

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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.