Home / 20,128.53-27,778.08-11,176.17

Finding the Fourth Proportional to 20,128.53, 27,778.08 and 11,176.17

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Solution

The fourth proportional to 20,128.53, 27,778.08 and 11,176.17 is: 15,423.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.53 : 27,778.08 = 11,176.17 : x
  2. Step 2: Convert to fraction form
    20,128.53/27,778.08 = 11,176.17/x
  3. Step 3: Cross multiply
    20,128.53x = 27,778.08 × 11,176.17
  4. Step 4: Simplify right side
    20,128.53x = 310,452,544.35
  5. Step 5: Solve for x
    x = 310,452,544.35/20,128.53
  6. Step 6: Final answer
    x = 15,423.51

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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.