Home / 21,115.89-29,138.94-11,683.71

Finding the Fourth Proportional to 21,115.89, 29,138.94 and 11,683.71

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Solution

The fourth proportional to 21,115.89, 29,138.94 and 11,683.71 is: 16,122.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.89 : 29,138.94 = 11,683.71 : x
  2. Step 2: Convert to fraction form
    21,115.89/29,138.94 = 11,683.71/x
  3. Step 3: Cross multiply
    21,115.89x = 29,138.94 × 11,683.71
  4. Step 4: Simplify right side
    21,115.89x = 340,450,924.67
  5. Step 5: Solve for x
    x = 340,450,924.67/21,115.89
  6. Step 6: Final answer
    x = 16,122.97

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1.5x scale

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.