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Finding the Fourth Proportional to 43,964.17, 65,921.65 and 18,988.63

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Solution

The fourth proportional to 43,964.17, 65,921.65 and 18,988.63 is: 28,472.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,964.17 : 65,921.65 = 18,988.63 : x
  2. Step 2: Convert to fraction form
    43,964.17/65,921.65 = 18,988.63/x
  3. Step 3: Cross multiply
    43,964.17x = 65,921.65 × 18,988.63
  4. Step 4: Simplify right side
    43,964.17x = 1,251,761,608.56
  5. Step 5: Solve for x
    x = 1,251,761,608.56/43,964.17
  6. Step 6: Final answer
    x = 28,472.31

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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.