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Finding the Fourth Proportional to 9,642, 13,305.96 and 5,226

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Solution

The fourth proportional to 9,642, 13,305.96 and 5,226 is: 7,211.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,642 : 13,305.96 = 5,226 : x
  2. Step 2: Convert to fraction form
    9,642/13,305.96 = 5,226/x
  3. Step 3: Cross multiply
    9,642x = 13,305.96 × 5,226
  4. Step 4: Simplify right side
    9,642x = 69,536,946.96
  5. Step 5: Solve for x
    x = 69,536,946.96/9,642
  6. Step 6: Final answer
    x = 7,211.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.