Home / 3,129.72-4,319-1,803.66

Finding the Fourth Proportional to 3,129.72, 4,319 and 1,803.66

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Solution

The fourth proportional to 3,129.72, 4,319 and 1,803.66 is: 2,489.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.72 : 4,319 = 1,803.66 : x
  2. Step 2: Convert to fraction form
    3,129.72/4,319 = 1,803.66/x
  3. Step 3: Cross multiply
    3,129.72x = 4,319 × 1,803.66
  4. Step 4: Simplify right side
    3,129.72x = 7,790,007.54
  5. Step 5: Solve for x
    x = 7,790,007.54/3,129.72
  6. Step 6: Final answer
    x = 2,489.04

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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.