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Finding the Fourth Proportional to 27,871.79, 38,460.69 and 15,932.79

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Solution

The fourth proportional to 27,871.79, 38,460.69 and 15,932.79 is: 21,985.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,871.79 : 38,460.69 = 15,932.79 : x
  2. Step 2: Convert to fraction form
    27,871.79/38,460.69 = 15,932.79/x
  3. Step 3: Cross multiply
    27,871.79x = 38,460.69 × 15,932.79
  4. Step 4: Simplify right side
    27,871.79x = 612,786,097.03
  5. Step 5: Solve for x
    x = 612,786,097.03/27,871.79
  6. Step 6: Final answer
    x = 21,985.89

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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.