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Finding the Fourth Proportional to 6,388.73, 8,813.37 and 4,120.93

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Solution

The fourth proportional to 6,388.73, 8,813.37 and 4,120.93 is: 5,684.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.73 : 8,813.37 = 4,120.93 : x
  2. Step 2: Convert to fraction form
    6,388.73/8,813.37 = 4,120.93/x
  3. Step 3: Cross multiply
    6,388.73x = 8,813.37 × 4,120.93
  4. Step 4: Simplify right side
    6,388.73x = 36,319,280.83
  5. Step 5: Solve for x
    x = 36,319,280.83/6,388.73
  6. Step 6: Final answer
    x = 5,684.90

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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.