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Finding the Fourth Proportional to 3,613.21, 4,986.21 and 2,100.23

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Solution

The fourth proportional to 3,613.21, 4,986.21 and 2,100.23 is: 2,898.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.21 : 4,986.21 = 2,100.23 : x
  2. Step 2: Convert to fraction form
    3,613.21/4,986.21 = 2,100.23/x
  3. Step 3: Cross multiply
    3,613.21x = 4,986.21 × 2,100.23
  4. Step 4: Simplify right side
    3,613.21x = 10,472,177.66
  5. Step 5: Solve for x
    x = 10,472,177.66/3,613.21
  6. Step 6: Final answer
    x = 2,898.31

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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.