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Finding the Fourth Proportional to 8,685.25, 11,987.37 and 4,908.47

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Solution

The fourth proportional to 8,685.25, 11,987.37 and 4,908.47 is: 6,774.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.25 : 11,987.37 = 4,908.47 : x
  2. Step 2: Convert to fraction form
    8,685.25/11,987.37 = 4,908.47/x
  3. Step 3: Cross multiply
    8,685.25x = 11,987.37 × 4,908.47
  4. Step 4: Simplify right side
    8,685.25x = 58,839,586.09
  5. Step 5: Solve for x
    x = 58,839,586.09/8,685.25
  6. Step 6: Final answer
    x = 6,774.66

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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.