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Finding the Fourth Proportional to 6,121.88, 8,451.42 and 4,913.72

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Solution

The fourth proportional to 6,121.88, 8,451.42 and 4,913.72 is: 6,783.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,121.88 : 8,451.42 = 4,913.72 : x
  2. Step 2: Convert to fraction form
    6,121.88/8,451.42 = 4,913.72/x
  3. Step 3: Cross multiply
    6,121.88x = 8,451.42 × 4,913.72
  4. Step 4: Simplify right side
    6,121.88x = 41,527,911.48
  5. Step 5: Solve for x
    x = 41,527,911.48/6,121.88
  6. Step 6: Final answer
    x = 6,783.52

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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.