Home / 10,208.55-15,305.13-5,211.66

Finding the Fourth Proportional to 10,208.55, 15,305.13 and 5,211.66

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Solution

The fourth proportional to 10,208.55, 15,305.13 and 5,211.66 is: 7,813.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,208.55 : 15,305.13 = 5,211.66 : x
  2. Step 2: Convert to fraction form
    10,208.55/15,305.13 = 5,211.66/x
  3. Step 3: Cross multiply
    10,208.55x = 15,305.13 × 5,211.66
  4. Step 4: Simplify right side
    10,208.55x = 79,765,133.82
  5. Step 5: Solve for x
    x = 79,765,133.82/10,208.55
  6. Step 6: Final answer
    x = 7,813.56

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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.