Home / 21,269.70-31,904.55-11,403.90

Finding the Fourth Proportional to 21,269.70, 31,904.55 and 11,403.90

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Solution

The fourth proportional to 21,269.70, 31,904.55 and 11,403.90 is: 17,105.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.70 : 31,904.55 = 11,403.90 : x
  2. Step 2: Convert to fraction form
    21,269.70/31,904.55 = 11,403.90/x
  3. Step 3: Cross multiply
    21,269.70x = 31,904.55 × 11,403.90
  4. Step 4: Simplify right side
    21,269.70x = 363,836,297.75
  5. Step 5: Solve for x
    x = 363,836,297.75/21,269.70
  6. Step 6: Final answer
    x = 17,105.85

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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.