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Finding the Fourth Proportional to 42,959.92, 64,439.88 and 11,795.98

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Solution

The fourth proportional to 42,959.92, 64,439.88 and 11,795.98 is: 17,693.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,959.92 : 64,439.88 = 11,795.98 : x
  2. Step 2: Convert to fraction form
    42,959.92/64,439.88 = 11,795.98/x
  3. Step 3: Cross multiply
    42,959.92x = 64,439.88 × 11,795.98
  4. Step 4: Simplify right side
    42,959.92x = 760,131,535.68
  5. Step 5: Solve for x
    x = 760,131,535.68/42,959.92
  6. Step 6: Final answer
    x = 17,693.97

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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.