Home / 3,172.09-4,376.69-1,913.89

Finding the Fourth Proportional to 3,172.09, 4,376.69 and 1,913.89

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Solution

The fourth proportional to 3,172.09, 4,376.69 and 1,913.89 is: 2,640.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.09 : 4,376.69 = 1,913.89 : x
  2. Step 2: Convert to fraction form
    3,172.09/4,376.69 = 1,913.89/x
  3. Step 3: Cross multiply
    3,172.09x = 4,376.69 × 1,913.89
  4. Step 4: Simplify right side
    3,172.09x = 8,376,503.22
  5. Step 5: Solve for x
    x = 8,376,503.22/3,172.09
  6. Step 6: Final answer
    x = 2,640.69

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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.