Home / 30,738.30-42,396.12-18,791.88

Finding the Fourth Proportional to 30,738.30, 42,396.12 and 18,791.88

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Solution

The fourth proportional to 30,738.30, 42,396.12 and 18,791.88 is: 25,918.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,738.30 : 42,396.12 = 18,791.88 : x
  2. Step 2: Convert to fraction form
    30,738.30/42,396.12 = 18,791.88/x
  3. Step 3: Cross multiply
    30,738.30x = 42,396.12 × 18,791.88
  4. Step 4: Simplify right side
    30,738.30x = 796,702,799.51
  5. Step 5: Solve for x
    x = 796,702,799.51/30,738.30
  6. Step 6: Final answer
    x = 25,918.90

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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.