Home / 20,756.58-28,640.36-11,803.56

Finding the Fourth Proportional to 20,756.58, 28,640.36 and 11,803.56

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Solution

The fourth proportional to 20,756.58, 28,640.36 and 11,803.56 is: 16,286.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.58 : 28,640.36 = 11,803.56 : x
  2. Step 2: Convert to fraction form
    20,756.58/28,640.36 = 11,803.56/x
  3. Step 3: Cross multiply
    20,756.58x = 28,640.36 × 11,803.56
  4. Step 4: Simplify right side
    20,756.58x = 338,058,207.68
  5. Step 5: Solve for x
    x = 338,058,207.68/20,756.58
  6. Step 6: Final answer
    x = 16,286.80

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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.