Home / 20,859.87-28,786.44-11,299.53

Finding the Fourth Proportional to 20,859.87, 28,786.44 and 11,299.53

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Solution

The fourth proportional to 20,859.87, 28,786.44 and 11,299.53 is: 15,593.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.87 : 28,786.44 = 11,299.53 : x
  2. Step 2: Convert to fraction form
    20,859.87/28,786.44 = 11,299.53/x
  3. Step 3: Cross multiply
    20,859.87x = 28,786.44 × 11,299.53
  4. Step 4: Simplify right side
    20,859.87x = 325,273,242.37
  5. Step 5: Solve for x
    x = 325,273,242.37/20,859.87
  6. Step 6: Final answer
    x = 15,593.25

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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.