Home / 3,121.90-4,308.18-1,795.62

Finding the Fourth Proportional to 3,121.90, 4,308.18 and 1,795.62

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Solution

The fourth proportional to 3,121.90, 4,308.18 and 1,795.62 is: 2,477.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.90 : 4,308.18 = 1,795.62 : x
  2. Step 2: Convert to fraction form
    3,121.90/4,308.18 = 1,795.62/x
  3. Step 3: Cross multiply
    3,121.90x = 4,308.18 × 1,795.62
  4. Step 4: Simplify right side
    3,121.90x = 7,735,854.17
  5. Step 5: Solve for x
    x = 7,735,854.17/3,121.90
  6. Step 6: Final answer
    x = 2,477.93

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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.