Home / 43,136.20-64,685.10-19,769.80

Finding the Fourth Proportional to 43,136.20, 64,685.10 and 19,769.80

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Solution

The fourth proportional to 43,136.20, 64,685.10 and 19,769.80 is: 29,645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,136.20 : 64,685.10 = 19,769.80 : x
  2. Step 2: Convert to fraction form
    43,136.20/64,685.10 = 19,769.80/x
  3. Step 3: Cross multiply
    43,136.20x = 64,685.10 × 19,769.80
  4. Step 4: Simplify right side
    43,136.20x = 1,278,811,489.98
  5. Step 5: Solve for x
    x = 1,278,811,489.98/43,136.20
  6. Step 6: Final answer
    x = 29,645.90

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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.