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Finding the Fourth Proportional to 6,615.77, 9,129.86 and 3,631.88

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Solution

The fourth proportional to 6,615.77, 9,129.86 and 3,631.88 is: 5,012.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615.77 : 9,129.86 = 3,631.88 : x
  2. Step 2: Convert to fraction form
    6,615.77/9,129.86 = 3,631.88/x
  3. Step 3: Cross multiply
    6,615.77x = 9,129.86 × 3,631.88
  4. Step 4: Simplify right side
    6,615.77x = 33,158,526.18
  5. Step 5: Solve for x
    x = 33,158,526.18/6,615.77
  6. Step 6: Final answer
    x = 5,012.04

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Why These Related Problems?

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