Home / 20,136.79-27,777.58-18,711.31

Finding the Fourth Proportional to 20,136.79, 27,777.58 and 18,711.31

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Solution

The fourth proportional to 20,136.79, 27,777.58 and 18,711.31 is: 25,811.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.79 : 27,777.58 = 18,711.31 : x
  2. Step 2: Convert to fraction form
    20,136.79/27,777.58 = 18,711.31/x
  3. Step 3: Cross multiply
    20,136.79x = 27,777.58 × 18,711.31
  4. Step 4: Simplify right side
    20,136.79x = 519,754,910.43
  5. Step 5: Solve for x
    x = 519,754,910.43/20,136.79
  6. Step 6: Final answer
    x = 25,811.21

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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.