Home / 19,877-27,429.26-11,917.68

Finding the Fourth Proportional to 19,877, 27,429.26 and 11,917.68

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Solution

The fourth proportional to 19,877, 27,429.26 and 11,917.68 is: 16,445.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,877 : 27,429.26 = 11,917.68 : x
  2. Step 2: Convert to fraction form
    19,877/27,429.26 = 11,917.68/x
  3. Step 3: Cross multiply
    19,877x = 27,429.26 × 11,917.68
  4. Step 4: Simplify right side
    19,877x = 326,893,143.32
  5. Step 5: Solve for x
    x = 326,893,143.32/19,877
  6. Step 6: Final answer
    x = 16,445.80

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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.