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Finding the Fourth Proportional to 3,981.93, 5,491.25 and 2,636.93

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Solution

The fourth proportional to 3,981.93, 5,491.25 and 2,636.93 is: 3,636.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.93 : 5,491.25 = 2,636.93 : x
  2. Step 2: Convert to fraction form
    3,981.93/5,491.25 = 2,636.93/x
  3. Step 3: Cross multiply
    3,981.93x = 5,491.25 × 2,636.93
  4. Step 4: Simplify right side
    3,981.93x = 14,480,001.22
  5. Step 5: Solve for x
    x = 14,480,001.22/3,981.93
  6. Step 6: Final answer
    x = 3,636.43

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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.