Home / 10,212.20-15,318.36-3,638.64

Finding the Fourth Proportional to 10,212.20, 15,318.36 and 3,638.64

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Solution

The fourth proportional to 10,212.20, 15,318.36 and 3,638.64 is: 5,457.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,212.20 : 15,318.36 = 3,638.64 : x
  2. Step 2: Convert to fraction form
    10,212.20/15,318.36 = 3,638.64/x
  3. Step 3: Cross multiply
    10,212.20x = 15,318.36 × 3,638.64
  4. Step 4: Simplify right side
    10,212.20x = 55,737,997.43
  5. Step 5: Solve for x
    x = 55,737,997.43/10,212.20
  6. Step 6: Final answer
    x = 5,457.98

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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.