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Finding the Fourth Proportional to 8,920.59, 13,376.73 and 3,990.27

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Solution

The fourth proportional to 8,920.59, 13,376.73 and 3,990.27 is: 5,983.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.59 : 13,376.73 = 3,990.27 : x
  2. Step 2: Convert to fraction form
    8,920.59/13,376.73 = 3,990.27/x
  3. Step 3: Cross multiply
    8,920.59x = 13,376.73 × 3,990.27
  4. Step 4: Simplify right side
    8,920.59x = 53,376,764.42
  5. Step 5: Solve for x
    x = 53,376,764.42/8,920.59
  6. Step 6: Final answer
    x = 5,983.55

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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.