Home / 20,128.81-27,777.22-11,176.08

Finding the Fourth Proportional to 20,128.81, 27,777.22 and 11,176.08

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Solution

The fourth proportional to 20,128.81, 27,777.22 and 11,176.08 is: 15,422.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.81 : 27,777.22 = 11,176.08 : x
  2. Step 2: Convert to fraction form
    20,128.81/27,777.22 = 11,176.08/x
  3. Step 3: Cross multiply
    20,128.81x = 27,777.22 × 11,176.08
  4. Step 4: Simplify right side
    20,128.81x = 310,440,519.91
  5. Step 5: Solve for x
    x = 310,440,519.91/20,128.81
  6. Step 6: Final answer
    x = 15,422.70

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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.