Home / 8,426.24-12,640.86-2,880.20

Finding the Fourth Proportional to 8,426.24, 12,640.86 and 2,880.20

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Solution

The fourth proportional to 8,426.24, 12,640.86 and 2,880.20 is: 4,320.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.24 : 12,640.86 = 2,880.20 : x
  2. Step 2: Convert to fraction form
    8,426.24/12,640.86 = 2,880.20/x
  3. Step 3: Cross multiply
    8,426.24x = 12,640.86 × 2,880.20
  4. Step 4: Simplify right side
    8,426.24x = 36,408,204.97
  5. Step 5: Solve for x
    x = 36,408,204.97/8,426.24
  6. Step 6: Final answer
    x = 4,320.81

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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.