Home / 8,178.12-11,285.85-4,640.64

Finding the Fourth Proportional to 8,178.12, 11,285.85 and 4,640.64

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Solution

The fourth proportional to 8,178.12, 11,285.85 and 4,640.64 is: 6,404.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.12 : 11,285.85 = 4,640.64 : x
  2. Step 2: Convert to fraction form
    8,178.12/11,285.85 = 4,640.64/x
  3. Step 3: Cross multiply
    8,178.12x = 11,285.85 × 4,640.64
  4. Step 4: Simplify right side
    8,178.12x = 52,373,566.94
  5. Step 5: Solve for x
    x = 52,373,566.94/8,178.12
  6. Step 6: Final answer
    x = 6,404.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.