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Finding the Fourth Proportional to 28,087.52, 38,760.24 and 15,512

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Solution

The fourth proportional to 28,087.52, 38,760.24 and 15,512 is: 21,406.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,087.52 : 38,760.24 = 15,512 : x
  2. Step 2: Convert to fraction form
    28,087.52/38,760.24 = 15,512/x
  3. Step 3: Cross multiply
    28,087.52x = 38,760.24 × 15,512
  4. Step 4: Simplify right side
    28,087.52x = 601,248,842.88
  5. Step 5: Solve for x
    x = 601,248,842.88/28,087.52
  6. Step 6: Final answer
    x = 21,406.26

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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.