Home / 15,147.38-20,900.32-9,175.58

Finding the Fourth Proportional to 15,147.38, 20,900.32 and 9,175.58

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Solution

The fourth proportional to 15,147.38, 20,900.32 and 9,175.58 is: 12,660.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,147.38 : 20,900.32 = 9,175.58 : x
  2. Step 2: Convert to fraction form
    15,147.38/20,900.32 = 9,175.58/x
  3. Step 3: Cross multiply
    15,147.38x = 20,900.32 × 9,175.58
  4. Step 4: Simplify right side
    15,147.38x = 191,772,453.68
  5. Step 5: Solve for x
    x = 191,772,453.68/15,147.38
  6. Step 6: Final answer
    x = 12,660.44

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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.