Home / 20,090.19-27,721.89-11,137.61

Finding the Fourth Proportional to 20,090.19, 27,721.89 and 11,137.61

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Solution

The fourth proportional to 20,090.19, 27,721.89 and 11,137.61 is: 15,368.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.19 : 27,721.89 = 11,137.61 : x
  2. Step 2: Convert to fraction form
    20,090.19/27,721.89 = 11,137.61/x
  3. Step 3: Cross multiply
    20,090.19x = 27,721.89 × 11,137.61
  4. Step 4: Simplify right side
    20,090.19x = 308,755,599.28
  5. Step 5: Solve for x
    x = 308,755,599.28/20,090.19
  6. Step 6: Final answer
    x = 15,368.48

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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.