Home / 15,145.52-20,900.06-8,431.73

Finding the Fourth Proportional to 15,145.52, 20,900.06 and 8,431.73

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Solution

The fourth proportional to 15,145.52, 20,900.06 and 8,431.73 is: 11,635.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.52 : 20,900.06 = 8,431.73 : x
  2. Step 2: Convert to fraction form
    15,145.52/20,900.06 = 8,431.73/x
  3. Step 3: Cross multiply
    15,145.52x = 20,900.06 × 8,431.73
  4. Step 4: Simplify right side
    15,145.52x = 176,223,662.90
  5. Step 5: Solve for x
    x = 176,223,662.90/15,145.52
  6. Step 6: Final answer
    x = 11,635.37

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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.