Home / 8,431.85-12,639.93-3,749.40

Finding the Fourth Proportional to 8,431.85, 12,639.93 and 3,749.40

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Solution

The fourth proportional to 8,431.85, 12,639.93 and 3,749.40 is: 5,620.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.85 : 12,639.93 = 3,749.40 : x
  2. Step 2: Convert to fraction form
    8,431.85/12,639.93 = 3,749.40/x
  3. Step 3: Cross multiply
    8,431.85x = 12,639.93 × 3,749.40
  4. Step 4: Simplify right side
    8,431.85x = 47,392,153.54
  5. Step 5: Solve for x
    x = 47,392,153.54/8,431.85
  6. Step 6: Final answer
    x = 5,620.61

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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.