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Finding the Fourth Proportional to 6,218.69, 8,582.87 and 3,980.45

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Solution

The fourth proportional to 6,218.69, 8,582.87 and 3,980.45 is: 5,493.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,218.69 : 8,582.87 = 3,980.45 : x
  2. Step 2: Convert to fraction form
    6,218.69/8,582.87 = 3,980.45/x
  3. Step 3: Cross multiply
    6,218.69x = 8,582.87 × 3,980.45
  4. Step 4: Simplify right side
    6,218.69x = 34,163,664.99
  5. Step 5: Solve for x
    x = 34,163,664.99/6,218.69
  6. Step 6: Final answer
    x = 5,493.71

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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.