Home / 10,431.20-15,648.16-3,408.76

Finding the Fourth Proportional to 10,431.20, 15,648.16 and 3,408.76

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Solution

The fourth proportional to 10,431.20, 15,648.16 and 3,408.76 is: 5,113.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,431.20 : 15,648.16 = 3,408.76 : x
  2. Step 2: Convert to fraction form
    10,431.20/15,648.16 = 3,408.76/x
  3. Step 3: Cross multiply
    10,431.20x = 15,648.16 × 3,408.76
  4. Step 4: Simplify right side
    10,431.20x = 53,340,821.88
  5. Step 5: Solve for x
    x = 53,340,821.88/10,431.20
  6. Step 6: Final answer
    x = 5,113.58

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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.