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Finding the Fourth Proportional to 6,686.56, 9,228.54 and 6,391.27

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Solution

The fourth proportional to 6,686.56, 9,228.54 and 6,391.27 is: 8,820.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,686.56 : 9,228.54 = 6,391.27 : x
  2. Step 2: Convert to fraction form
    6,686.56/9,228.54 = 6,391.27/x
  3. Step 3: Cross multiply
    6,686.56x = 9,228.54 × 6,391.27
  4. Step 4: Simplify right side
    6,686.56x = 58,982,090.85
  5. Step 5: Solve for x
    x = 58,982,090.85/6,686.56
  6. Step 6: Final answer
    x = 8,820.99

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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.