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Finding the Fourth Proportional to 6,342.48, 8,755.80 and 3,985.92

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Solution

The fourth proportional to 6,342.48, 8,755.80 and 3,985.92 is: 5,502.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,342.48 : 8,755.80 = 3,985.92 : x
  2. Step 2: Convert to fraction form
    6,342.48/8,755.80 = 3,985.92/x
  3. Step 3: Cross multiply
    6,342.48x = 8,755.80 × 3,985.92
  4. Step 4: Simplify right side
    6,342.48x = 34,899,918.34
  5. Step 5: Solve for x
    x = 34,899,918.34/6,342.48
  6. Step 6: Final answer
    x = 5,502.57

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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.