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Finding the Fourth Proportional to 7,956.61, 11,938.28 and 4,257.88

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Solution

The fourth proportional to 7,956.61, 11,938.28 and 4,257.88 is: 6,388.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,956.61 : 11,938.28 = 4,257.88 : x
  2. Step 2: Convert to fraction form
    7,956.61/11,938.28 = 4,257.88/x
  3. Step 3: Cross multiply
    7,956.61x = 11,938.28 × 4,257.88
  4. Step 4: Simplify right side
    7,956.61x = 50,831,714.60
  5. Step 5: Solve for x
    x = 50,831,714.60/7,956.61
  6. Step 6: Final answer
    x = 6,388.62

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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.