Home / 18,921.22-28,381.82-8,923.64

Finding the Fourth Proportional to 18,921.22, 28,381.82 and 8,923.64

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Solution

The fourth proportional to 18,921.22, 28,381.82 and 8,923.64 is: 13,385.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.22 : 28,381.82 = 8,923.64 : x
  2. Step 2: Convert to fraction form
    18,921.22/28,381.82 = 8,923.64/x
  3. Step 3: Cross multiply
    18,921.22x = 28,381.82 × 8,923.64
  4. Step 4: Simplify right side
    18,921.22x = 253,269,144.22
  5. Step 5: Solve for x
    x = 253,269,144.22/18,921.22
  6. Step 6: Final answer
    x = 13,385.46

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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.