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Finding the Fourth Proportional to 43,310.76, 64,966.13 and 13,728.58

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Solution

The fourth proportional to 43,310.76, 64,966.13 and 13,728.58 is: 20,592.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,310.76 : 64,966.13 = 13,728.58 : x
  2. Step 2: Convert to fraction form
    43,310.76/64,966.13 = 13,728.58/x
  3. Step 3: Cross multiply
    43,310.76x = 64,966.13 × 13,728.58
  4. Step 4: Simplify right side
    43,310.76x = 891,892,481.94
  5. Step 5: Solve for x
    x = 891,892,481.94/43,310.76
  6. Step 6: Final answer
    x = 20,592.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.