Home / 15,213.12-20,986.20-10,171.68

Finding the Fourth Proportional to 15,213.12, 20,986.20 and 10,171.68

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Solution

The fourth proportional to 15,213.12, 20,986.20 and 10,171.68 is: 14,031.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,213.12 : 20,986.20 = 10,171.68 : x
  2. Step 2: Convert to fraction form
    15,213.12/20,986.20 = 10,171.68/x
  3. Step 3: Cross multiply
    15,213.12x = 20,986.20 × 10,171.68
  4. Step 4: Simplify right side
    15,213.12x = 213,464,910.82
  5. Step 5: Solve for x
    x = 213,464,910.82/15,213.12
  6. Step 6: Final answer
    x = 14,031.63

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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.