Home / 10,212.56-15,311.12-5,215.66

Finding the Fourth Proportional to 10,212.56, 15,311.12 and 5,215.66

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Solution

The fourth proportional to 10,212.56, 15,311.12 and 5,215.66 is: 7,819.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,212.56 : 15,311.12 = 5,215.66 : x
  2. Step 2: Convert to fraction form
    10,212.56/15,311.12 = 5,215.66/x
  3. Step 3: Cross multiply
    10,212.56x = 15,311.12 × 5,215.66
  4. Step 4: Simplify right side
    10,212.56x = 79,857,596.14
  5. Step 5: Solve for x
    x = 79,857,596.14/10,212.56
  6. Step 6: Final answer
    x = 7,819.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.