Home / 21,858.90-30,138.39-16,185.66

Finding the Fourth Proportional to 21,858.90, 30,138.39 and 16,185.66

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Solution

The fourth proportional to 21,858.90, 30,138.39 and 16,185.66 is: 22,316.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.90 : 30,138.39 = 16,185.66 : x
  2. Step 2: Convert to fraction form
    21,858.90/30,138.39 = 16,185.66/x
  3. Step 3: Cross multiply
    21,858.90x = 30,138.39 × 16,185.66
  4. Step 4: Simplify right side
    21,858.90x = 487,809,733.49
  5. Step 5: Solve for x
    x = 487,809,733.49/21,858.90
  6. Step 6: Final answer
    x = 22,316.30

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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.