Home / 20,133.68-27,777.84-12,172.88

Finding the Fourth Proportional to 20,133.68, 27,777.84 and 12,172.88

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Solution

The fourth proportional to 20,133.68, 27,777.84 and 12,172.88 is: 16,794.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,133.68 : 27,777.84 = 12,172.88 : x
  2. Step 2: Convert to fraction form
    20,133.68/27,777.84 = 12,172.88/x
  3. Step 3: Cross multiply
    20,133.68x = 27,777.84 × 12,172.88
  4. Step 4: Simplify right side
    20,133.68x = 338,136,312.98
  5. Step 5: Solve for x
    x = 338,136,312.98/20,133.68
  6. Step 6: Final answer
    x = 16,794.56

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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.