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Finding the Fourth Proportional to 8,993.75, 13,489.65 and 2,420.60

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Solution

The fourth proportional to 8,993.75, 13,489.65 and 2,420.60 is: 3,630.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,993.75 : 13,489.65 = 2,420.60 : x
  2. Step 2: Convert to fraction form
    8,993.75/13,489.65 = 2,420.60/x
  3. Step 3: Cross multiply
    8,993.75x = 13,489.65 × 2,420.60
  4. Step 4: Simplify right side
    8,993.75x = 32,652,979.34
  5. Step 5: Solve for x
    x = 32,652,979.34/8,993.75
  6. Step 6: Final answer
    x = 3,630.63

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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.