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Finding the Fourth Proportional to 3,981.93, 5,494.98 and 2,189.45

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Solution

The fourth proportional to 3,981.93, 5,494.98 and 2,189.45 is: 3,021.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.93 : 5,494.98 = 2,189.45 : x
  2. Step 2: Convert to fraction form
    3,981.93/5,494.98 = 2,189.45/x
  3. Step 3: Cross multiply
    3,981.93x = 5,494.98 × 2,189.45
  4. Step 4: Simplify right side
    3,981.93x = 12,030,956.49
  5. Step 5: Solve for x
    x = 12,030,956.49/3,981.93
  6. Step 6: Final answer
    x = 3,021.39

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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.