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Finding the Fourth Proportional to 6,665.16, 9,990.80 and 2,969.12

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Solution

The fourth proportional to 6,665.16, 9,990.80 and 2,969.12 is: 4,450.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,665.16 : 9,990.80 = 2,969.12 : x
  2. Step 2: Convert to fraction form
    6,665.16/9,990.80 = 2,969.12/x
  3. Step 3: Cross multiply
    6,665.16x = 9,990.80 × 2,969.12
  4. Step 4: Simplify right side
    6,665.16x = 29,663,884.10
  5. Step 5: Solve for x
    x = 29,663,884.10/6,665.16
  6. Step 6: Final answer
    x = 4,450.59

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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.