Home / 15,145.62-20,900.73-8,431.25

Finding the Fourth Proportional to 15,145.62, 20,900.73 and 8,431.25

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Solution

The fourth proportional to 15,145.62, 20,900.73 and 8,431.25 is: 11,634.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.62 : 20,900.73 = 8,431.25 : x
  2. Step 2: Convert to fraction form
    15,145.62/20,900.73 = 8,431.25/x
  3. Step 3: Cross multiply
    15,145.62x = 20,900.73 × 8,431.25
  4. Step 4: Simplify right side
    15,145.62x = 176,219,175.31
  5. Step 5: Solve for x
    x = 176,219,175.31/15,145.62
  6. Step 6: Final answer
    x = 11,634.99

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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.