Home / 3,929.77-5,423.08-2,161.37

Finding the Fourth Proportional to 3,929.77, 5,423.08 and 2,161.37

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Solution

The fourth proportional to 3,929.77, 5,423.08 and 2,161.37 is: 2,982.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.77 : 5,423.08 = 2,161.37 : x
  2. Step 2: Convert to fraction form
    3,929.77/5,423.08 = 2,161.37/x
  3. Step 3: Cross multiply
    3,929.77x = 5,423.08 × 2,161.37
  4. Step 4: Simplify right side
    3,929.77x = 11,721,280.92
  5. Step 5: Solve for x
    x = 11,721,280.92/3,929.77
  6. Step 6: Final answer
    x = 2,982.69

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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.