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Finding the Fourth Proportional to 10,387.97, 15,578.31 and 2,990.44

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Solution

The fourth proportional to 10,387.97, 15,578.31 and 2,990.44 is: 4,484.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,387.97 : 15,578.31 = 2,990.44 : x
  2. Step 2: Convert to fraction form
    10,387.97/15,578.31 = 2,990.44/x
  3. Step 3: Cross multiply
    10,387.97x = 15,578.31 × 2,990.44
  4. Step 4: Simplify right side
    10,387.97x = 46,586,001.36
  5. Step 5: Solve for x
    x = 46,586,001.36/10,387.97
  6. Step 6: Final answer
    x = 4,484.61

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1.5x scale

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.