Home / 21,843.88-30,143.56-13,360.21

Finding the Fourth Proportional to 21,843.88, 30,143.56 and 13,360.21

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Solution

The fourth proportional to 21,843.88, 30,143.56 and 13,360.21 is: 18,436.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,843.88 : 30,143.56 = 13,360.21 : x
  2. Step 2: Convert to fraction form
    21,843.88/30,143.56 = 13,360.21/x
  3. Step 3: Cross multiply
    21,843.88x = 30,143.56 × 13,360.21
  4. Step 4: Simplify right side
    21,843.88x = 402,724,308.45
  5. Step 5: Solve for x
    x = 402,724,308.45/21,843.88
  6. Step 6: Final answer
    x = 18,436.48

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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.