Home / 3,905.61-5,389.63-2,137.18

Finding the Fourth Proportional to 3,905.61, 5,389.63 and 2,137.18

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Solution

The fourth proportional to 3,905.61, 5,389.63 and 2,137.18 is: 2,949.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.61 : 5,389.63 = 2,137.18 : x
  2. Step 2: Convert to fraction form
    3,905.61/5,389.63 = 2,137.18/x
  3. Step 3: Cross multiply
    3,905.61x = 5,389.63 × 2,137.18
  4. Step 4: Simplify right side
    3,905.61x = 11,518,571.81
  5. Step 5: Solve for x
    x = 11,518,571.81/3,905.61
  6. Step 6: Final answer
    x = 2,949.24

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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.