Home / 20,128.90-27,777.68-11,632.80

Finding the Fourth Proportional to 20,128.90, 27,777.68 and 11,632.80

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Solution

The fourth proportional to 20,128.90, 27,777.68 and 11,632.80 is: 16,053.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.90 : 27,777.68 = 11,632.80 : x
  2. Step 2: Convert to fraction form
    20,128.90/27,777.68 = 11,632.80/x
  3. Step 3: Cross multiply
    20,128.90x = 27,777.68 × 11,632.80
  4. Step 4: Simplify right side
    20,128.90x = 323,132,195.90
  5. Step 5: Solve for x
    x = 323,132,195.90/20,128.90
  6. Step 6: Final answer
    x = 16,053.15

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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.