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Finding the Fourth Proportional to 6,489.55, 9,735.72 and 2,106.91

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Solution

The fourth proportional to 6,489.55, 9,735.72 and 2,106.91 is: 3,160.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.55 : 9,735.72 = 2,106.91 : x
  2. Step 2: Convert to fraction form
    6,489.55/9,735.72 = 2,106.91/x
  3. Step 3: Cross multiply
    6,489.55x = 9,735.72 × 2,106.91
  4. Step 4: Simplify right side
    6,489.55x = 20,512,285.83
  5. Step 5: Solve for x
    x = 20,512,285.83/6,489.55
  6. Step 6: Final answer
    x = 3,160.82

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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.