Home / 20,949.21-28,905.77-11,751.06

Finding the Fourth Proportional to 20,949.21, 28,905.77 and 11,751.06

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Solution

The fourth proportional to 20,949.21, 28,905.77 and 11,751.06 is: 16,214.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.21 : 28,905.77 = 11,751.06 : x
  2. Step 2: Convert to fraction form
    20,949.21/28,905.77 = 11,751.06/x
  3. Step 3: Cross multiply
    20,949.21x = 28,905.77 × 11,751.06
  4. Step 4: Simplify right side
    20,949.21x = 339,673,437.62
  5. Step 5: Solve for x
    x = 339,673,437.62/20,949.21
  6. Step 6: Final answer
    x = 16,214.14

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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.