Home / 15,335.21-21,162.11-8,621.12

Finding the Fourth Proportional to 15,335.21, 21,162.11 and 8,621.12

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Solution

The fourth proportional to 15,335.21, 21,162.11 and 8,621.12 is: 11,896.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,335.21 : 21,162.11 = 8,621.12 : x
  2. Step 2: Convert to fraction form
    15,335.21/21,162.11 = 8,621.12/x
  3. Step 3: Cross multiply
    15,335.21x = 21,162.11 × 8,621.12
  4. Step 4: Simplify right side
    15,335.21x = 182,440,940.85
  5. Step 5: Solve for x
    x = 182,440,940.85/15,335.21
  6. Step 6: Final answer
    x = 11,896.87

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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.