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Finding the Fourth Proportional to 6,219.88, 8,579.68 and 3,981

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Solution

The fourth proportional to 6,219.88, 8,579.68 and 3,981 is: 5,491.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,219.88 : 8,579.68 = 3,981 : x
  2. Step 2: Convert to fraction form
    6,219.88/8,579.68 = 3,981/x
  3. Step 3: Cross multiply
    6,219.88x = 8,579.68 × 3,981
  4. Step 4: Simplify right side
    6,219.88x = 34,155,706.08
  5. Step 5: Solve for x
    x = 34,155,706.08/6,219.88
  6. Step 6: Final answer
    x = 5,491.38

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Half scale
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Double scale
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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.