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Finding the Fourth Proportional to 8,485.51, 12,728.13 and 2,642.44

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Solution

The fourth proportional to 8,485.51, 12,728.13 and 2,642.44 is: 3,963.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.51 : 12,728.13 = 2,642.44 : x
  2. Step 2: Convert to fraction form
    8,485.51/12,728.13 = 2,642.44/x
  3. Step 3: Cross multiply
    8,485.51x = 12,728.13 × 2,642.44
  4. Step 4: Simplify right side
    8,485.51x = 33,633,319.84
  5. Step 5: Solve for x
    x = 33,633,319.84/8,485.51
  6. Step 6: Final answer
    x = 3,963.62

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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.