Home / 3,126.42-4,689.72-1,809.36

Finding the Fourth Proportional to 3,126.42, 4,689.72 and 1,809.36

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Solution

The fourth proportional to 3,126.42, 4,689.72 and 1,809.36 is: 2,714.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.42 : 4,689.72 = 1,809.36 : x
  2. Step 2: Convert to fraction form
    3,126.42/4,689.72 = 1,809.36/x
  3. Step 3: Cross multiply
    3,126.42x = 4,689.72 × 1,809.36
  4. Step 4: Simplify right side
    3,126.42x = 8,485,391.78
  5. Step 5: Solve for x
    x = 8,485,391.78/3,126.42
  6. Step 6: Final answer
    x = 2,714.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.