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Finding the Fourth Proportional to 6,920.60, 9,551.79 and 3,936.15

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Solution

The fourth proportional to 6,920.60, 9,551.79 and 3,936.15 is: 5,432.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.60 : 9,551.79 = 3,936.15 : x
  2. Step 2: Convert to fraction form
    6,920.60/9,551.79 = 3,936.15/x
  3. Step 3: Cross multiply
    6,920.60x = 9,551.79 × 3,936.15
  4. Step 4: Simplify right side
    6,920.60x = 37,597,278.21
  5. Step 5: Solve for x
    x = 37,597,278.21/6,920.60
  6. Step 6: Final answer
    x = 5,432.67

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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.