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Finding the Fourth Proportional to 47,691.75, 65,820.69 and 28,828.88

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Solution

The fourth proportional to 47,691.75, 65,820.69 and 28,828.88 is: 39,787.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,691.75 : 65,820.69 = 28,828.88 : x
  2. Step 2: Convert to fraction form
    47,691.75/65,820.69 = 28,828.88/x
  3. Step 3: Cross multiply
    47,691.75x = 65,820.69 × 28,828.88
  4. Step 4: Simplify right side
    47,691.75x = 1,897,536,444.42
  5. Step 5: Solve for x
    x = 1,897,536,444.42/47,691.75
  6. Step 6: Final answer
    x = 39,787.52

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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.