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Finding the Fourth Proportional to 28,956, 39,959.28 and 16,380.48

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Solution

The fourth proportional to 28,956, 39,959.28 and 16,380.48 is: 22,605.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,956 : 39,959.28 = 16,380.48 : x
  2. Step 2: Convert to fraction form
    28,956/39,959.28 = 16,380.48/x
  3. Step 3: Cross multiply
    28,956x = 39,959.28 × 16,380.48
  4. Step 4: Simplify right side
    28,956x = 654,552,186.85
  5. Step 5: Solve for x
    x = 654,552,186.85/28,956
  6. Step 6: Final answer
    x = 22,605.06

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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.