Home / 21,914.21-30,239.19-13,418.47

Finding the Fourth Proportional to 21,914.21, 30,239.19 and 13,418.47

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Solution

The fourth proportional to 21,914.21, 30,239.19 and 13,418.47 is: 18,516.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,914.21 : 30,239.19 = 13,418.47 : x
  2. Step 2: Convert to fraction form
    21,914.21/30,239.19 = 13,418.47/x
  3. Step 3: Cross multiply
    21,914.21x = 30,239.19 × 13,418.47
  4. Step 4: Simplify right side
    21,914.21x = 405,763,663.84
  5. Step 5: Solve for x
    x = 405,763,663.84/21,914.21
  6. Step 6: Final answer
    x = 18,516.01

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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.