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Finding the Fourth Proportional to 29,271.81, 40,394.79 and 15,842.79

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Solution

The fourth proportional to 29,271.81, 40,394.79 and 15,842.79 is: 21,862.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,271.81 : 40,394.79 = 15,842.79 : x
  2. Step 2: Convert to fraction form
    29,271.81/40,394.79 = 15,842.79/x
  3. Step 3: Cross multiply
    29,271.81x = 40,394.79 × 15,842.79
  4. Step 4: Simplify right side
    29,271.81x = 639,966,175.06
  5. Step 5: Solve for x
    x = 639,966,175.06/29,271.81
  6. Step 6: Final answer
    x = 21,862.88

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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.