Home / 40,136.22-55,387.36-21,986.79

Finding the Fourth Proportional to 40,136.22, 55,387.36 and 21,986.79

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Solution

The fourth proportional to 40,136.22, 55,387.36 and 21,986.79 is: 30,341.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,136.22 : 55,387.36 = 21,986.79 : x
  2. Step 2: Convert to fraction form
    40,136.22/55,387.36 = 21,986.79/x
  3. Step 3: Cross multiply
    40,136.22x = 55,387.36 × 21,986.79
  4. Step 4: Simplify right side
    40,136.22x = 1,217,790,252.97
  5. Step 5: Solve for x
    x = 1,217,790,252.97/40,136.22
  6. Step 6: Final answer
    x = 30,341.43

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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.