Home / 13,981.80-21,021.30-11,843.40

Finding the Fourth Proportional to 13,981.80, 21,021.30 and 11,843.40

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Solution

The fourth proportional to 13,981.80, 21,021.30 and 11,843.40 is: 17,806.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.80 : 21,021.30 = 11,843.40 : x
  2. Step 2: Convert to fraction form
    13,981.80/21,021.30 = 11,843.40/x
  3. Step 3: Cross multiply
    13,981.80x = 21,021.30 × 11,843.40
  4. Step 4: Simplify right side
    13,981.80x = 248,963,664.42
  5. Step 5: Solve for x
    x = 248,963,664.42/13,981.80
  6. Step 6: Final answer
    x = 17,806.27

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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.