Home / 20,137.37-27,788.80-11,185.45

Finding the Fourth Proportional to 20,137.37, 27,788.80 and 11,185.45

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Solution

The fourth proportional to 20,137.37, 27,788.80 and 11,185.45 is: 15,435.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,137.37 : 27,788.80 = 11,185.45 : x
  2. Step 2: Convert to fraction form
    20,137.37/27,788.80 = 11,185.45/x
  3. Step 3: Cross multiply
    20,137.37x = 27,788.80 × 11,185.45
  4. Step 4: Simplify right side
    20,137.37x = 310,830,232.96
  5. Step 5: Solve for x
    x = 310,830,232.96/20,137.37
  6. Step 6: Final answer
    x = 15,435.49

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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.