Home / 20,388.96-28,093.62-18,986.44

Finding the Fourth Proportional to 20,388.96, 28,093.62 and 18,986.44

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Solution

The fourth proportional to 20,388.96, 28,093.62 and 18,986.44 is: 26,161.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.96 : 28,093.62 = 18,986.44 : x
  2. Step 2: Convert to fraction form
    20,388.96/28,093.62 = 18,986.44/x
  3. Step 3: Cross multiply
    20,388.96x = 28,093.62 × 18,986.44
  4. Step 4: Simplify right side
    20,388.96x = 533,397,830.51
  5. Step 5: Solve for x
    x = 533,397,830.51/20,388.96
  6. Step 6: Final answer
    x = 26,161.11

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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.