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Finding the Fourth Proportional to 13,372.80, 20,059.20 and 9,225.60

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Solution

The fourth proportional to 13,372.80, 20,059.20 and 9,225.60 is: 13,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,372.80 : 20,059.20 = 9,225.60 : x
  2. Step 2: Convert to fraction form
    13,372.80/20,059.20 = 9,225.60/x
  3. Step 3: Cross multiply
    13,372.80x = 20,059.20 × 9,225.60
  4. Step 4: Simplify right side
    13,372.80x = 185,058,155.52
  5. Step 5: Solve for x
    x = 185,058,155.52/13,372.80
  6. Step 6: Final answer
    x = 13,838.40

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.