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Finding the Fourth Proportional to 6,484.78, 9,727.20 and 3,561.50

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Solution

The fourth proportional to 6,484.78, 9,727.20 and 3,561.50 is: 5,342.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,484.78 : 9,727.20 = 3,561.50 : x
  2. Step 2: Convert to fraction form
    6,484.78/9,727.20 = 3,561.50/x
  3. Step 3: Cross multiply
    6,484.78x = 9,727.20 × 3,561.50
  4. Step 4: Simplify right side
    6,484.78x = 34,643,422.80
  5. Step 5: Solve for x
    x = 34,643,422.80/6,484.78
  6. Step 6: Final answer
    x = 5,342.27

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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.