Home / 20,131.04-27,782.16-12,177.92

Finding the Fourth Proportional to 20,131.04, 27,782.16 and 12,177.92

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Solution

The fourth proportional to 20,131.04, 27,782.16 and 12,177.92 is: 16,806.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.04 : 27,782.16 = 12,177.92 : x
  2. Step 2: Convert to fraction form
    20,131.04/27,782.16 = 12,177.92/x
  3. Step 3: Cross multiply
    20,131.04x = 27,782.16 × 12,177.92
  4. Step 4: Simplify right side
    20,131.04x = 338,328,921.91
  5. Step 5: Solve for x
    x = 338,328,921.91/20,131.04
  6. Step 6: Final answer
    x = 16,806.33

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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.