Home / 28,021.19-42,020.84-12,231.05

Finding the Fourth Proportional to 28,021.19, 42,020.84 and 12,231.05

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Solution

The fourth proportional to 28,021.19, 42,020.84 and 12,231.05 is: 18,341.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,021.19 : 42,020.84 = 12,231.05 : x
  2. Step 2: Convert to fraction form
    28,021.19/42,020.84 = 12,231.05/x
  3. Step 3: Cross multiply
    28,021.19x = 42,020.84 × 12,231.05
  4. Step 4: Simplify right side
    28,021.19x = 513,958,815.56
  5. Step 5: Solve for x
    x = 513,958,815.56/28,021.19
  6. Step 6: Final answer
    x = 18,341.79

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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.