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Finding the Fourth Proportional to 20,165.51, 27,828.03 and 11,212.82

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Solution

The fourth proportional to 20,165.51, 27,828.03 and 11,212.82 is: 15,473.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,165.51 : 27,828.03 = 11,212.82 : x
  2. Step 2: Convert to fraction form
    20,165.51/27,828.03 = 11,212.82/x
  3. Step 3: Cross multiply
    20,165.51x = 27,828.03 × 11,212.82
  4. Step 4: Simplify right side
    20,165.51x = 312,030,691.34
  5. Step 5: Solve for x
    x = 312,030,691.34/20,165.51
  6. Step 6: Final answer
    x = 15,473.48

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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.