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Finding the Fourth Proportional to 8,440.91, 12,661.36 and 3,759.71

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Solution

The fourth proportional to 8,440.91, 12,661.36 and 3,759.71 is: 5,639.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,440.91 : 12,661.36 = 3,759.71 : x
  2. Step 2: Convert to fraction form
    8,440.91/12,661.36 = 3,759.71/x
  3. Step 3: Cross multiply
    8,440.91x = 12,661.36 × 3,759.71
  4. Step 4: Simplify right side
    8,440.91x = 47,603,041.81
  5. Step 5: Solve for x
    x = 47,603,041.81/8,440.91
  6. Step 6: Final answer
    x = 5,639.56

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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.