Home / 21,067.10-31,605.36-7,919.58

Finding the Fourth Proportional to 21,067.10, 31,605.36 and 7,919.58

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Solution

The fourth proportional to 21,067.10, 31,605.36 and 7,919.58 is: 11,881.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,067.10 : 31,605.36 = 7,919.58 : x
  2. Step 2: Convert to fraction form
    21,067.10/31,605.36 = 7,919.58/x
  3. Step 3: Cross multiply
    21,067.10x = 31,605.36 × 7,919.58
  4. Step 4: Simplify right side
    21,067.10x = 250,301,265.77
  5. Step 5: Solve for x
    x = 250,301,265.77/21,067.10
  6. Step 6: Final answer
    x = 11,881.15

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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.