Home / 20,718.45-28,591.38-11,765.52

Finding the Fourth Proportional to 20,718.45, 28,591.38 and 11,765.52

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Solution

The fourth proportional to 20,718.45, 28,591.38 and 11,765.52 is: 16,236.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.45 : 28,591.38 = 11,765.52 : x
  2. Step 2: Convert to fraction form
    20,718.45/28,591.38 = 11,765.52/x
  3. Step 3: Cross multiply
    20,718.45x = 28,591.38 × 11,765.52
  4. Step 4: Simplify right side
    20,718.45x = 336,392,453.22
  5. Step 5: Solve for x
    x = 336,392,453.22/20,718.45
  6. Step 6: Final answer
    x = 16,236.37

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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.