Home / 20,128.66-27,778.42-11,176.16

Finding the Fourth Proportional to 20,128.66, 27,778.42 and 11,176.16

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Solution

The fourth proportional to 20,128.66, 27,778.42 and 11,176.16 is: 15,423.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.66 : 27,778.42 = 11,176.16 : x
  2. Step 2: Convert to fraction form
    20,128.66/27,778.42 = 11,176.16/x
  3. Step 3: Cross multiply
    20,128.66x = 27,778.42 × 11,176.16
  4. Step 4: Simplify right side
    20,128.66x = 310,456,066.47
  5. Step 5: Solve for x
    x = 310,456,066.47/20,128.66
  6. Step 6: Final answer
    x = 15,423.58

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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.