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Finding the Fourth Proportional to 3,643.88, 5,026.90 and 2,151.80

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Solution

The fourth proportional to 3,643.88, 5,026.90 and 2,151.80 is: 2,968.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,643.88 : 5,026.90 = 2,151.80 : x
  2. Step 2: Convert to fraction form
    3,643.88/5,026.90 = 2,151.80/x
  3. Step 3: Cross multiply
    3,643.88x = 5,026.90 × 2,151.80
  4. Step 4: Simplify right side
    3,643.88x = 10,816,883.42
  5. Step 5: Solve for x
    x = 10,816,883.42/3,643.88
  6. Step 6: Final answer
    x = 2,968.51

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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.