Home / 3,809.62-5,256.10-2,130.80

Finding the Fourth Proportional to 3,809.62, 5,256.10 and 2,130.80

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Solution

The fourth proportional to 3,809.62, 5,256.10 and 2,130.80 is: 2,939.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,809.62 : 5,256.10 = 2,130.80 : x
  2. Step 2: Convert to fraction form
    3,809.62/5,256.10 = 2,130.80/x
  3. Step 3: Cross multiply
    3,809.62x = 5,256.10 × 2,130.80
  4. Step 4: Simplify right side
    3,809.62x = 11,199,697.88
  5. Step 5: Solve for x
    x = 11,199,697.88/3,809.62
  6. Step 6: Final answer
    x = 2,939.85

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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.