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Finding the Fourth Proportional to 8,618.99, 12,920.27 and 2,771.49

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Solution

The fourth proportional to 8,618.99, 12,920.27 and 2,771.49 is: 4,154.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.99 : 12,920.27 = 2,771.49 : x
  2. Step 2: Convert to fraction form
    8,618.99/12,920.27 = 2,771.49/x
  3. Step 3: Cross multiply
    8,618.99x = 12,920.27 × 2,771.49
  4. Step 4: Simplify right side
    8,618.99x = 35,808,399.10
  5. Step 5: Solve for x
    x = 35,808,399.10/8,618.99
  6. Step 6: Final answer
    x = 4,154.59

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Double scale
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Similar ratio
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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.