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Finding the Fourth Proportional to 28,382.48, 39,165.48 and 15,806

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Solution

The fourth proportional to 28,382.48, 39,165.48 and 15,806 is: 21,810.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.48 : 39,165.48 = 15,806 : x
  2. Step 2: Convert to fraction form
    28,382.48/39,165.48 = 15,806/x
  3. Step 3: Cross multiply
    28,382.48x = 39,165.48 × 15,806
  4. Step 4: Simplify right side
    28,382.48x = 619,049,576.88
  5. Step 5: Solve for x
    x = 619,049,576.88/28,382.48
  6. Step 6: Final answer
    x = 21,810.98

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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.