Home / 30,219.94-41,690.12-20,138.56

Finding the Fourth Proportional to 30,219.94, 41,690.12 and 20,138.56

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Solution

The fourth proportional to 30,219.94, 41,690.12 and 20,138.56 is: 27,782.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,219.94 : 41,690.12 = 20,138.56 : x
  2. Step 2: Convert to fraction form
    30,219.94/41,690.12 = 20,138.56/x
  3. Step 3: Cross multiply
    30,219.94x = 41,690.12 × 20,138.56
  4. Step 4: Simplify right side
    30,219.94x = 839,578,983.03
  5. Step 5: Solve for x
    x = 839,578,983.03/30,219.94
  6. Step 6: Final answer
    x = 27,782.28

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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.