Home / 20,859.90-28,786.47-11,299.57

Finding the Fourth Proportional to 20,859.90, 28,786.47 and 11,299.57

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Solution

The fourth proportional to 20,859.90, 28,786.47 and 11,299.57 is: 15,593.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.90 : 28,786.47 = 11,299.57 : x
  2. Step 2: Convert to fraction form
    20,859.90/28,786.47 = 11,299.57/x
  3. Step 3: Cross multiply
    20,859.90x = 28,786.47 × 11,299.57
  4. Step 4: Simplify right side
    20,859.90x = 325,274,682.04
  5. Step 5: Solve for x
    x = 325,274,682.04/20,859.90
  6. Step 6: Final answer
    x = 15,593.30

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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.