Home / 20,965.89-28,933.53-11,535.06

Finding the Fourth Proportional to 20,965.89, 28,933.53 and 11,535.06

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Solution

The fourth proportional to 20,965.89, 28,933.53 and 11,535.06 is: 15,918.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.89 : 28,933.53 = 11,535.06 : x
  2. Step 2: Convert to fraction form
    20,965.89/28,933.53 = 11,535.06/x
  3. Step 3: Cross multiply
    20,965.89x = 28,933.53 × 11,535.06
  4. Step 4: Simplify right side
    20,965.89x = 333,750,004.56
  5. Step 5: Solve for x
    x = 333,750,004.56/20,965.89
  6. Step 6: Final answer
    x = 15,918.71

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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.