Home / 28,026.78-38,679.69-20,940.90

Finding the Fourth Proportional to 28,026.78, 38,679.69 and 20,940.90

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Solution

The fourth proportional to 28,026.78, 38,679.69 and 20,940.90 is: 28,900.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,026.78 : 38,679.69 = 20,940.90 : x
  2. Step 2: Convert to fraction form
    28,026.78/38,679.69 = 20,940.90/x
  3. Step 3: Cross multiply
    28,026.78x = 38,679.69 × 20,940.90
  4. Step 4: Simplify right side
    28,026.78x = 809,987,520.32
  5. Step 5: Solve for x
    x = 809,987,520.32/28,026.78
  6. Step 6: Final answer
    x = 28,900.48

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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.