Home / 21,905.58-30,247.41-20,804.79

Finding the Fourth Proportional to 21,905.58, 30,247.41 and 20,804.79

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Solution

The fourth proportional to 21,905.58, 30,247.41 and 20,804.79 is: 28,727.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.58 : 30,247.41 = 20,804.79 : x
  2. Step 2: Convert to fraction form
    21,905.58/30,247.41 = 20,804.79/x
  3. Step 3: Cross multiply
    21,905.58x = 30,247.41 × 20,804.79
  4. Step 4: Simplify right side
    21,905.58x = 629,291,013.09
  5. Step 5: Solve for x
    x = 629,291,013.09/21,905.58
  6. Step 6: Final answer
    x = 28,727.43

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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.