Home / 20,487.03-28,278.37-11,991.14

Finding the Fourth Proportional to 20,487.03, 28,278.37 and 11,991.14

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Solution

The fourth proportional to 20,487.03, 28,278.37 and 11,991.14 is: 16,551.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.03 : 28,278.37 = 11,991.14 : x
  2. Step 2: Convert to fraction form
    20,487.03/28,278.37 = 11,991.14/x
  3. Step 3: Cross multiply
    20,487.03x = 28,278.37 × 11,991.14
  4. Step 4: Simplify right side
    20,487.03x = 339,089,805.83
  5. Step 5: Solve for x
    x = 339,089,805.83/20,487.03
  6. Step 6: Final answer
    x = 16,551.44

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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.