Home / 13,147-19,723.38-4,939

Finding the Fourth Proportional to 13,147, 19,723.38 and 4,939

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Solution

The fourth proportional to 13,147, 19,723.38 and 4,939 is: 7,409.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147 : 19,723.38 = 4,939 : x
  2. Step 2: Convert to fraction form
    13,147/19,723.38 = 4,939/x
  3. Step 3: Cross multiply
    13,147x = 19,723.38 × 4,939
  4. Step 4: Simplify right side
    13,147x = 97,413,773.82
  5. Step 5: Solve for x
    x = 97,413,773.82/13,147
  6. Step 6: Final answer
    x = 7,409.58

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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.