Home / 20,215.20-30,322.80-18,738.98

Finding the Fourth Proportional to 20,215.20, 30,322.80 and 18,738.98

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Solution

The fourth proportional to 20,215.20, 30,322.80 and 18,738.98 is: 28,108.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.20 : 30,322.80 = 18,738.98 : x
  2. Step 2: Convert to fraction form
    20,215.20/30,322.80 = 18,738.98/x
  3. Step 3: Cross multiply
    20,215.20x = 30,322.80 × 18,738.98
  4. Step 4: Simplify right side
    20,215.20x = 568,218,191.13
  5. Step 5: Solve for x
    x = 568,218,191.13/20,215.20
  6. Step 6: Final answer
    x = 28,108.46

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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.