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Finding the Fourth Proportional to 29,191.20, 43,786.80 and 13,639.20

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Solution

The fourth proportional to 29,191.20, 43,786.80 and 13,639.20 is: 20,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,191.20 : 43,786.80 = 13,639.20 : x
  2. Step 2: Convert to fraction form
    29,191.20/43,786.80 = 13,639.20/x
  3. Step 3: Cross multiply
    29,191.20x = 43,786.80 × 13,639.20
  4. Step 4: Simplify right side
    29,191.20x = 597,216,922.56
  5. Step 5: Solve for x
    x = 597,216,922.56/29,191.20
  6. Step 6: Final answer
    x = 20,458.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.