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Finding the Fourth Proportional to 7,328.63, 10,991.90 and 2,647.98

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Solution

The fourth proportional to 7,328.63, 10,991.90 and 2,647.98 is: 3,971.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,328.63 : 10,991.90 = 2,647.98 : x
  2. Step 2: Convert to fraction form
    7,328.63/10,991.90 = 2,647.98/x
  3. Step 3: Cross multiply
    7,328.63x = 10,991.90 × 2,647.98
  4. Step 4: Simplify right side
    7,328.63x = 29,106,337.98
  5. Step 5: Solve for x
    x = 29,106,337.98/7,328.63
  6. Step 6: Final answer
    x = 3,971.59

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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.