Home / 28,181.78-38,872.14-18,122.94

Finding the Fourth Proportional to 28,181.78, 38,872.14 and 18,122.94

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Solution

The fourth proportional to 28,181.78, 38,872.14 and 18,122.94 is: 24,997.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.78 : 38,872.14 = 18,122.94 : x
  2. Step 2: Convert to fraction form
    28,181.78/38,872.14 = 18,122.94/x
  3. Step 3: Cross multiply
    28,181.78x = 38,872.14 × 18,122.94
  4. Step 4: Simplify right side
    28,181.78x = 704,477,392.93
  5. Step 5: Solve for x
    x = 704,477,392.93/28,181.78
  6. Step 6: Final answer
    x = 24,997.62

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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.