Home / 20,111.74-27,753.84-11,159.09

Finding the Fourth Proportional to 20,111.74, 27,753.84 and 11,159.09

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Solution

The fourth proportional to 20,111.74, 27,753.84 and 11,159.09 is: 15,399.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.74 : 27,753.84 = 11,159.09 : x
  2. Step 2: Convert to fraction form
    20,111.74/27,753.84 = 11,159.09/x
  3. Step 3: Cross multiply
    20,111.74x = 27,753.84 × 11,159.09
  4. Step 4: Simplify right side
    20,111.74x = 309,707,403.84
  5. Step 5: Solve for x
    x = 309,707,403.84/20,111.74
  6. Step 6: Final answer
    x = 15,399.34

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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.