Home / 15,500.21-21,388.79-8,694.50

Finding the Fourth Proportional to 15,500.21, 21,388.79 and 8,694.50

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Solution

The fourth proportional to 15,500.21, 21,388.79 and 8,694.50 is: 11,997.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.21 : 21,388.79 = 8,694.50 : x
  2. Step 2: Convert to fraction form
    15,500.21/21,388.79 = 8,694.50/x
  3. Step 3: Cross multiply
    15,500.21x = 21,388.79 × 8,694.50
  4. Step 4: Simplify right side
    15,500.21x = 185,964,684.24
  5. Step 5: Solve for x
    x = 185,964,684.24/15,500.21
  6. Step 6: Final answer
    x = 11,997.56

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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.