Home / 18,211.63-27,252.42-13,219.78

Finding the Fourth Proportional to 18,211.63, 27,252.42 and 13,219.78

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Solution

The fourth proportional to 18,211.63, 27,252.42 and 13,219.78 is: 19,782.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,211.63 : 27,252.42 = 13,219.78 : x
  2. Step 2: Convert to fraction form
    18,211.63/27,252.42 = 13,219.78/x
  3. Step 3: Cross multiply
    18,211.63x = 27,252.42 × 13,219.78
  4. Step 4: Simplify right side
    18,211.63x = 360,270,996.87
  5. Step 5: Solve for x
    x = 360,270,996.87/18,211.63
  6. Step 6: Final answer
    x = 19,782.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.