Home / 20,317.16-28,043.64-11,821.28

Finding the Fourth Proportional to 20,317.16, 28,043.64 and 11,821.28

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Solution

The fourth proportional to 20,317.16, 28,043.64 and 11,821.28 is: 16,316.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,317.16 : 28,043.64 = 11,821.28 : x
  2. Step 2: Convert to fraction form
    20,317.16/28,043.64 = 11,821.28/x
  3. Step 3: Cross multiply
    20,317.16x = 28,043.64 × 11,821.28
  4. Step 4: Simplify right side
    20,317.16x = 331,511,720.66
  5. Step 5: Solve for x
    x = 331,511,720.66/20,317.16
  6. Step 6: Final answer
    x = 16,316.83

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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.