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Finding the Fourth Proportional to 6,861.70, 10,279.59 and 3,931.12

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Solution

The fourth proportional to 6,861.70, 10,279.59 and 3,931.12 is: 5,889.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,861.70 : 10,279.59 = 3,931.12 : x
  2. Step 2: Convert to fraction form
    6,861.70/10,279.59 = 3,931.12/x
  3. Step 3: Cross multiply
    6,861.70x = 10,279.59 × 3,931.12
  4. Step 4: Simplify right side
    6,861.70x = 40,410,301.84
  5. Step 5: Solve for x
    x = 40,410,301.84/6,861.70
  6. Step 6: Final answer
    x = 5,889.26

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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.