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Finding the Fourth Proportional to 3,891.81, 5,810 and 3,755.12

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Solution

The fourth proportional to 3,891.81, 5,810 and 3,755.12 is: 5,605.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.81 : 5,810 = 3,755.12 : x
  2. Step 2: Convert to fraction form
    3,891.81/5,810 = 3,755.12/x
  3. Step 3: Cross multiply
    3,891.81x = 5,810 × 3,755.12
  4. Step 4: Simplify right side
    3,891.81x = 21,817,247.20
  5. Step 5: Solve for x
    x = 21,817,247.20/3,891.81
  6. Step 6: Final answer
    x = 5,605.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.