Home / 20,893.37-28,825.34-12,388.90

Finding the Fourth Proportional to 20,893.37, 28,825.34 and 12,388.90

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Solution

The fourth proportional to 20,893.37, 28,825.34 and 12,388.90 is: 17,092.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.37 : 28,825.34 = 12,388.90 : x
  2. Step 2: Convert to fraction form
    20,893.37/28,825.34 = 12,388.90/x
  3. Step 3: Cross multiply
    20,893.37x = 28,825.34 × 12,388.90
  4. Step 4: Simplify right side
    20,893.37x = 357,114,279.30
  5. Step 5: Solve for x
    x = 357,114,279.30/20,893.37
  6. Step 6: Final answer
    x = 17,092.23

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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.