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Finding the Fourth Proportional to 21,843.63, 30,143.22 and 13,359.96

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Solution

The fourth proportional to 21,843.63, 30,143.22 and 13,359.96 is: 18,436.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,843.63 : 30,143.22 = 13,359.96 : x
  2. Step 2: Convert to fraction form
    21,843.63/30,143.22 = 13,359.96/x
  3. Step 3: Cross multiply
    21,843.63x = 30,143.22 × 13,359.96
  4. Step 4: Simplify right side
    21,843.63x = 402,712,163.37
  5. Step 5: Solve for x
    x = 402,712,163.37/21,843.63
  6. Step 6: Final answer
    x = 18,436.14

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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.