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Finding the Fourth Proportional to 6,886, 10,331.16 and 2,990.98

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Solution

The fourth proportional to 6,886, 10,331.16 and 2,990.98 is: 4,487.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,886 : 10,331.16 = 2,990.98 : x
  2. Step 2: Convert to fraction form
    6,886/10,331.16 = 2,990.98/x
  3. Step 3: Cross multiply
    6,886x = 10,331.16 × 2,990.98
  4. Step 4: Simplify right side
    6,886x = 30,900,292.94
  5. Step 5: Solve for x
    x = 30,900,292.94/6,886
  6. Step 6: Final answer
    x = 4,487.41

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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.