Home / 3,147.49-4,343.16-1,821.61

Finding the Fourth Proportional to 3,147.49, 4,343.16 and 1,821.61

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Solution

The fourth proportional to 3,147.49, 4,343.16 and 1,821.61 is: 2,513.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.49 : 4,343.16 = 1,821.61 : x
  2. Step 2: Convert to fraction form
    3,147.49/4,343.16 = 1,821.61/x
  3. Step 3: Cross multiply
    3,147.49x = 4,343.16 × 1,821.61
  4. Step 4: Simplify right side
    3,147.49x = 7,911,543.69
  5. Step 5: Solve for x
    x = 7,911,543.69/3,147.49
  6. Step 6: Final answer
    x = 2,513.60

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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.