Home / 21,115.36-29,138.78-11,683.92

Finding the Fourth Proportional to 21,115.36, 29,138.78 and 11,683.92

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Solution

The fourth proportional to 21,115.36, 29,138.78 and 11,683.92 is: 16,123.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.36 : 29,138.78 = 11,683.92 : x
  2. Step 2: Convert to fraction form
    21,115.36/29,138.78 = 11,683.92/x
  3. Step 3: Cross multiply
    21,115.36x = 29,138.78 × 11,683.92
  4. Step 4: Simplify right side
    21,115.36x = 340,455,174.42
  5. Step 5: Solve for x
    x = 340,455,174.42/21,115.36
  6. Step 6: Final answer
    x = 16,123.58

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.