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Finding the Fourth Proportional to 3,895.18, 5,375.44 and 2,126.90

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Solution

The fourth proportional to 3,895.18, 5,375.44 and 2,126.90 is: 2,935.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,895.18 : 5,375.44 = 2,126.90 : x
  2. Step 2: Convert to fraction form
    3,895.18/5,375.44 = 2,126.90/x
  3. Step 3: Cross multiply
    3,895.18x = 5,375.44 × 2,126.90
  4. Step 4: Simplify right side
    3,895.18x = 11,433,023.34
  5. Step 5: Solve for x
    x = 11,433,023.34/3,895.18
  6. Step 6: Final answer
    x = 2,935.17

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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.