Home / 15,221.21-21,005.37-8,507.12

Finding the Fourth Proportional to 15,221.21, 21,005.37 and 8,507.12

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Solution

The fourth proportional to 15,221.21, 21,005.37 and 8,507.12 is: 11,739.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.21 : 21,005.37 = 8,507.12 : x
  2. Step 2: Convert to fraction form
    15,221.21/21,005.37 = 8,507.12/x
  3. Step 3: Cross multiply
    15,221.21x = 21,005.37 × 8,507.12
  4. Step 4: Simplify right side
    15,221.21x = 178,695,098.21
  5. Step 5: Solve for x
    x = 178,695,098.21/15,221.21
  6. Step 6: Final answer
    x = 11,739.88

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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.