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Finding the Fourth Proportional to 6,873.90, 9,485.10 and 3,889.86

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Solution

The fourth proportional to 6,873.90, 9,485.10 and 3,889.86 is: 5,367.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,873.90 : 9,485.10 = 3,889.86 : x
  2. Step 2: Convert to fraction form
    6,873.90/9,485.10 = 3,889.86/x
  3. Step 3: Cross multiply
    6,873.90x = 9,485.10 × 3,889.86
  4. Step 4: Simplify right side
    6,873.90x = 36,895,711.09
  5. Step 5: Solve for x
    x = 36,895,711.09/6,873.90
  6. Step 6: Final answer
    x = 5,367.51

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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.