Home / 3,929.94-5,423.34-2,161.66

Finding the Fourth Proportional to 3,929.94, 5,423.34 and 2,161.66

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Solution

The fourth proportional to 3,929.94, 5,423.34 and 2,161.66 is: 2,983.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.94 : 5,423.34 = 2,161.66 : x
  2. Step 2: Convert to fraction form
    3,929.94/5,423.34 = 2,161.66/x
  3. Step 3: Cross multiply
    3,929.94x = 5,423.34 × 2,161.66
  4. Step 4: Simplify right side
    3,929.94x = 11,723,417.14
  5. Step 5: Solve for x
    x = 11,723,417.14/3,929.94
  6. Step 6: Final answer
    x = 2,983.10

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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.