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Finding the Fourth Proportional to 7,758.72, 11,638.08 and 1,915.44

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Solution

The fourth proportional to 7,758.72, 11,638.08 and 1,915.44 is: 2,873.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,758.72 : 11,638.08 = 1,915.44 : x
  2. Step 2: Convert to fraction form
    7,758.72/11,638.08 = 1,915.44/x
  3. Step 3: Cross multiply
    7,758.72x = 11,638.08 × 1,915.44
  4. Step 4: Simplify right side
    7,758.72x = 22,292,043.96
  5. Step 5: Solve for x
    x = 22,292,043.96/7,758.72
  6. Step 6: Final answer
    x = 2,873.16

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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.