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Finding the Fourth Proportional to 19,842.80, 27,383.15 and 10,891.29

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Solution

The fourth proportional to 19,842.80, 27,383.15 and 10,891.29 is: 15,030.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,842.80 : 27,383.15 = 10,891.29 : x
  2. Step 2: Convert to fraction form
    19,842.80/27,383.15 = 10,891.29/x
  3. Step 3: Cross multiply
    19,842.80x = 27,383.15 × 10,891.29
  4. Step 4: Simplify right side
    19,842.80x = 298,237,827.76
  5. Step 5: Solve for x
    x = 298,237,827.76/19,842.80
  6. Step 6: Final answer
    x = 15,030.03

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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.