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Finding the Fourth Proportional to 8,454.88, 11,678.88 and 6,489.72

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Solution

The fourth proportional to 8,454.88, 11,678.88 and 6,489.72 is: 8,964.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,454.88 : 11,678.88 = 6,489.72 : x
  2. Step 2: Convert to fraction form
    8,454.88/11,678.88 = 6,489.72/x
  3. Step 3: Cross multiply
    8,454.88x = 11,678.88 × 6,489.72
  4. Step 4: Simplify right side
    8,454.88x = 75,792,685.45
  5. Step 5: Solve for x
    x = 75,792,685.45/8,454.88
  6. Step 6: Final answer
    x = 8,964.37

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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.