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Finding the Fourth Proportional to 7,817.72, 11,721.11 and 2,886.03

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Solution

The fourth proportional to 7,817.72, 11,721.11 and 2,886.03 is: 4,327.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,817.72 : 11,721.11 = 2,886.03 : x
  2. Step 2: Convert to fraction form
    7,817.72/11,721.11 = 2,886.03/x
  3. Step 3: Cross multiply
    7,817.72x = 11,721.11 × 2,886.03
  4. Step 4: Simplify right side
    7,817.72x = 33,827,460.66
  5. Step 5: Solve for x
    x = 33,827,460.66/7,817.72
  6. Step 6: Final answer
    x = 4,327.03

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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.