Home / 20,128.73-27,776.81-11,175.70

Finding the Fourth Proportional to 20,128.73, 27,776.81 and 11,175.70

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Solution

The fourth proportional to 20,128.73, 27,776.81 and 11,175.70 is: 15,422.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.73 : 27,776.81 = 11,175.70 : x
  2. Step 2: Convert to fraction form
    20,128.73/27,776.81 = 11,175.70/x
  3. Step 3: Cross multiply
    20,128.73x = 27,776.81 × 11,175.70
  4. Step 4: Simplify right side
    20,128.73x = 310,425,243.23
  5. Step 5: Solve for x
    x = 310,425,243.23/20,128.73
  6. Step 6: Final answer
    x = 15,422.00

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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.