Home / 8,320.78-12,485.97-4,622.70

Finding the Fourth Proportional to 8,320.78, 12,485.97 and 4,622.70

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Solution

The fourth proportional to 8,320.78, 12,485.97 and 4,622.70 is: 6,936.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.78 : 12,485.97 = 4,622.70 : x
  2. Step 2: Convert to fraction form
    8,320.78/12,485.97 = 4,622.70/x
  3. Step 3: Cross multiply
    8,320.78x = 12,485.97 × 4,622.70
  4. Step 4: Simplify right side
    8,320.78x = 57,718,893.52
  5. Step 5: Solve for x
    x = 57,718,893.52/8,320.78
  6. Step 6: Final answer
    x = 6,936.71

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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.