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Finding the Fourth Proportional to 13,762.72, 18,987.60 and 8,173.60

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Solution

The fourth proportional to 13,762.72, 18,987.60 and 8,173.60 is: 11,276.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,762.72 : 18,987.60 = 8,173.60 : x
  2. Step 2: Convert to fraction form
    13,762.72/18,987.60 = 8,173.60/x
  3. Step 3: Cross multiply
    13,762.72x = 18,987.60 × 8,173.60
  4. Step 4: Simplify right side
    13,762.72x = 155,197,047.36
  5. Step 5: Solve for x
    x = 155,197,047.36/13,762.72
  6. Step 6: Final answer
    x = 11,276.63

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.