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Finding the Fourth Proportional to 8,874.40, 13,322.40 and 4,489.60

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Solution

The fourth proportional to 8,874.40, 13,322.40 and 4,489.60 is: 6,739.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,874.40 : 13,322.40 = 4,489.60 : x
  2. Step 2: Convert to fraction form
    8,874.40/13,322.40 = 4,489.60/x
  3. Step 3: Cross multiply
    8,874.40x = 13,322.40 × 4,489.60
  4. Step 4: Simplify right side
    8,874.40x = 59,812,247.04
  5. Step 5: Solve for x
    x = 59,812,247.04/8,874.40
  6. Step 6: Final answer
    x = 6,739.86

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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.