Home / 8,420.85-12,631.26-3,739.76

Finding the Fourth Proportional to 8,420.85, 12,631.26 and 3,739.76

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Solution

The fourth proportional to 8,420.85, 12,631.26 and 3,739.76 is: 5,609.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.85 : 12,631.26 = 3,739.76 : x
  2. Step 2: Convert to fraction form
    8,420.85/12,631.26 = 3,739.76/x
  3. Step 3: Cross multiply
    8,420.85x = 12,631.26 × 3,739.76
  4. Step 4: Simplify right side
    8,420.85x = 47,237,880.90
  5. Step 5: Solve for x
    x = 47,237,880.90/8,420.85
  6. Step 6: Final answer
    x = 5,609.63

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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.