Home / 21,155.94-31,734.84-11,788.86

Finding the Fourth Proportional to 21,155.94, 31,734.84 and 11,788.86

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Solution

The fourth proportional to 21,155.94, 31,734.84 and 11,788.86 is: 17,683.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.94 : 31,734.84 = 11,788.86 : x
  2. Step 2: Convert to fraction form
    21,155.94/31,734.84 = 11,788.86/x
  3. Step 3: Cross multiply
    21,155.94x = 31,734.84 × 11,788.86
  4. Step 4: Simplify right side
    21,155.94x = 374,117,585.88
  5. Step 5: Solve for x
    x = 374,117,585.88/21,155.94
  6. Step 6: Final answer
    x = 17,683.81

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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.