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Finding the Fourth Proportional to 30,805.87, 42,512.09 and 17,377.08

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Solution

The fourth proportional to 30,805.87, 42,512.09 and 17,377.08 is: 23,980.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,805.87 : 42,512.09 = 17,377.08 : x
  2. Step 2: Convert to fraction form
    30,805.87/42,512.09 = 17,377.08/x
  3. Step 3: Cross multiply
    30,805.87x = 42,512.09 × 17,377.08
  4. Step 4: Simplify right side
    30,805.87x = 738,736,079.47
  5. Step 5: Solve for x
    x = 738,736,079.47/30,805.87
  6. Step 6: Final answer
    x = 23,980.37

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.