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Finding the Fourth Proportional to 6,954.30, 10,380.86 and 6,440.35

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Solution

The fourth proportional to 6,954.30, 10,380.86 and 6,440.35 is: 9,613.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,954.30 : 10,380.86 = 6,440.35 : x
  2. Step 2: Convert to fraction form
    6,954.30/10,380.86 = 6,440.35/x
  3. Step 3: Cross multiply
    6,954.30x = 10,380.86 × 6,440.35
  4. Step 4: Simplify right side
    6,954.30x = 66,856,386.36
  5. Step 5: Solve for x
    x = 66,856,386.36/6,954.30
  6. Step 6: Final answer
    x = 9,613.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.