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Finding the Fourth Proportional to 6,440.87, 9,660.20 and 1,937.86

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Solution

The fourth proportional to 6,440.87, 9,660.20 and 1,937.86 is: 2,906.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,440.87 : 9,660.20 = 1,937.86 : x
  2. Step 2: Convert to fraction form
    6,440.87/9,660.20 = 1,937.86/x
  3. Step 3: Cross multiply
    6,440.87x = 9,660.20 × 1,937.86
  4. Step 4: Simplify right side
    6,440.87x = 18,720,081.33
  5. Step 5: Solve for x
    x = 18,720,081.33/6,440.87
  6. Step 6: Final answer
    x = 2,906.45

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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.