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Finding the Fourth Proportional to 12,495.72, 18,743.16 and 3,261.72

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Solution

The fourth proportional to 12,495.72, 18,743.16 and 3,261.72 is: 4,892.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,495.72 : 18,743.16 = 3,261.72 : x
  2. Step 2: Convert to fraction form
    12,495.72/18,743.16 = 3,261.72/x
  3. Step 3: Cross multiply
    12,495.72x = 18,743.16 × 3,261.72
  4. Step 4: Simplify right side
    12,495.72x = 61,134,939.84
  5. Step 5: Solve for x
    x = 61,134,939.84/12,495.72
  6. Step 6: Final answer
    x = 4,892.47

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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.