Home / 15,936.12-21,988.24-9,221.56

Finding the Fourth Proportional to 15,936.12, 21,988.24 and 9,221.56

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Solution

The fourth proportional to 15,936.12, 21,988.24 and 9,221.56 is: 12,723.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,936.12 : 21,988.24 = 9,221.56 : x
  2. Step 2: Convert to fraction form
    15,936.12/21,988.24 = 9,221.56/x
  3. Step 3: Cross multiply
    15,936.12x = 21,988.24 × 9,221.56
  4. Step 4: Simplify right side
    15,936.12x = 202,765,874.45
  5. Step 5: Solve for x
    x = 202,765,874.45/15,936.12
  6. Step 6: Final answer
    x = 12,723.67

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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.