Home / 20,949.26-28,911.64-11,999.58

Finding the Fourth Proportional to 20,949.26, 28,911.64 and 11,999.58

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Solution

The fourth proportional to 20,949.26, 28,911.64 and 11,999.58 is: 16,560.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.26 : 28,911.64 = 11,999.58 : x
  2. Step 2: Convert to fraction form
    20,949.26/28,911.64 = 11,999.58/x
  3. Step 3: Cross multiply
    20,949.26x = 28,911.64 × 11,999.58
  4. Step 4: Simplify right side
    20,949.26x = 346,927,537.11
  5. Step 5: Solve for x
    x = 346,927,537.11/20,949.26
  6. Step 6: Final answer
    x = 16,560.37

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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.