Home / 20,318.05-28,044.55-11,821.82

Finding the Fourth Proportional to 20,318.05, 28,044.55 and 11,821.82

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Solution

The fourth proportional to 20,318.05, 28,044.55 and 11,821.82 is: 16,317.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.05 : 28,044.55 = 11,821.82 : x
  2. Step 2: Convert to fraction form
    20,318.05/28,044.55 = 11,821.82/x
  3. Step 3: Cross multiply
    20,318.05x = 28,044.55 × 11,821.82
  4. Step 4: Simplify right side
    20,318.05x = 331,537,487.36
  5. Step 5: Solve for x
    x = 331,537,487.36/20,318.05
  6. Step 6: Final answer
    x = 16,317.39

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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.