Home / 20,764.36-31,145.49-11,422.63

Finding the Fourth Proportional to 20,764.36, 31,145.49 and 11,422.63

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Solution

The fourth proportional to 20,764.36, 31,145.49 and 11,422.63 is: 17,133.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.36 : 31,145.49 = 11,422.63 : x
  2. Step 2: Convert to fraction form
    20,764.36/31,145.49 = 11,422.63/x
  3. Step 3: Cross multiply
    20,764.36x = 31,145.49 × 11,422.63
  4. Step 4: Simplify right side
    20,764.36x = 355,763,408.44
  5. Step 5: Solve for x
    x = 355,763,408.44/20,764.36
  6. Step 6: Final answer
    x = 17,133.37

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1.5x scale

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.