Home / 3,845.80-5,307.21-2,167.21

Finding the Fourth Proportional to 3,845.80, 5,307.21 and 2,167.21

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Solution

The fourth proportional to 3,845.80, 5,307.21 and 2,167.21 is: 2,990.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,845.80 : 5,307.21 = 2,167.21 : x
  2. Step 2: Convert to fraction form
    3,845.80/5,307.21 = 2,167.21/x
  3. Step 3: Cross multiply
    3,845.80x = 5,307.21 × 2,167.21
  4. Step 4: Simplify right side
    3,845.80x = 11,501,825.32
  5. Step 5: Solve for x
    x = 11,501,825.32/3,845.80
  6. Step 6: Final answer
    x = 2,990.75

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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.