Home / 20,662.89-28,515.02-11,231.48

Finding the Fourth Proportional to 20,662.89, 28,515.02 and 11,231.48

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Solution

The fourth proportional to 20,662.89, 28,515.02 and 11,231.48 is: 15,499.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.89 : 28,515.02 = 11,231.48 : x
  2. Step 2: Convert to fraction form
    20,662.89/28,515.02 = 11,231.48/x
  3. Step 3: Cross multiply
    20,662.89x = 28,515.02 × 11,231.48
  4. Step 4: Simplify right side
    20,662.89x = 320,265,678.10
  5. Step 5: Solve for x
    x = 320,265,678.10/20,662.89
  6. Step 6: Final answer
    x = 15,499.56

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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.