Home / 13,781.87-19,018.64-8,040.43

Finding the Fourth Proportional to 13,781.87, 19,018.64 and 8,040.43

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Solution

The fourth proportional to 13,781.87, 19,018.64 and 8,040.43 is: 11,095.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.87 : 19,018.64 = 8,040.43 : x
  2. Step 2: Convert to fraction form
    13,781.87/19,018.64 = 8,040.43/x
  3. Step 3: Cross multiply
    13,781.87x = 19,018.64 × 8,040.43
  4. Step 4: Simplify right side
    13,781.87x = 152,917,948.52
  5. Step 5: Solve for x
    x = 152,917,948.52/13,781.87
  6. Step 6: Final answer
    x = 11,095.59

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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.