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Finding the Fourth Proportional to 6,632.40, 9,939.80 and 4,869.15

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Solution

The fourth proportional to 6,632.40, 9,939.80 and 4,869.15 is: 7,297.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,632.40 : 9,939.80 = 4,869.15 : x
  2. Step 2: Convert to fraction form
    6,632.40/9,939.80 = 4,869.15/x
  3. Step 3: Cross multiply
    6,632.40x = 9,939.80 × 4,869.15
  4. Step 4: Simplify right side
    6,632.40x = 48,398,426.62
  5. Step 5: Solve for x
    x = 48,398,426.62/6,632.40
  6. Step 6: Final answer
    x = 7,297.28

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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.