Home / 20,081.31-27,710.95-11,128.29

Finding the Fourth Proportional to 20,081.31, 27,710.95 and 11,128.29

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Solution

The fourth proportional to 20,081.31, 27,710.95 and 11,128.29 is: 15,356.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.31 : 27,710.95 = 11,128.29 : x
  2. Step 2: Convert to fraction form
    20,081.31/27,710.95 = 11,128.29/x
  3. Step 3: Cross multiply
    20,081.31x = 27,710.95 × 11,128.29
  4. Step 4: Simplify right side
    20,081.31x = 308,375,487.78
  5. Step 5: Solve for x
    x = 308,375,487.78/20,081.31
  6. Step 6: Final answer
    x = 15,356.34

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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.