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Finding the Fourth Proportional to 3,906.77, 5,389.07 and 2,913.17

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Solution

The fourth proportional to 3,906.77, 5,389.07 and 2,913.17 is: 4,018.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.77 : 5,389.07 = 2,913.17 : x
  2. Step 2: Convert to fraction form
    3,906.77/5,389.07 = 2,913.17/x
  3. Step 3: Cross multiply
    3,906.77x = 5,389.07 × 2,913.17
  4. Step 4: Simplify right side
    3,906.77x = 15,699,235.54
  5. Step 5: Solve for x
    x = 15,699,235.54/3,906.77
  6. Step 6: Final answer
    x = 4,018.47

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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.