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Finding the Fourth Proportional to 8,456.93, 11,672.90 and 4,920.80

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Solution

The fourth proportional to 8,456.93, 11,672.90 and 4,920.80 is: 6,792.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,456.93 : 11,672.90 = 4,920.80 : x
  2. Step 2: Convert to fraction form
    8,456.93/11,672.90 = 4,920.80/x
  3. Step 3: Cross multiply
    8,456.93x = 11,672.90 × 4,920.80
  4. Step 4: Simplify right side
    8,456.93x = 57,439,923.35
  5. Step 5: Solve for x
    x = 57,439,923.35/8,456.93
  6. Step 6: Final answer
    x = 6,792.06

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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.