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Finding the Fourth Proportional to 7,889.66, 11,837.28 and 3,506.72

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Solution

The fourth proportional to 7,889.66, 11,837.28 and 3,506.72 is: 5,261.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,889.66 : 11,837.28 = 3,506.72 : x
  2. Step 2: Convert to fraction form
    7,889.66/11,837.28 = 3,506.72/x
  3. Step 3: Cross multiply
    7,889.66x = 11,837.28 × 3,506.72
  4. Step 4: Simplify right side
    7,889.66x = 41,510,026.52
  5. Step 5: Solve for x
    x = 41,510,026.52/7,889.66
  6. Step 6: Final answer
    x = 5,261.32

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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.