Home / 20,984.99-28,958.37-11,424.89

Finding the Fourth Proportional to 20,984.99, 28,958.37 and 11,424.89

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Solution

The fourth proportional to 20,984.99, 28,958.37 and 11,424.89 is: 15,765.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.99 : 28,958.37 = 11,424.89 : x
  2. Step 2: Convert to fraction form
    20,984.99/28,958.37 = 11,424.89/x
  3. Step 3: Cross multiply
    20,984.99x = 28,958.37 × 11,424.89
  4. Step 4: Simplify right side
    20,984.99x = 330,846,047.04
  5. Step 5: Solve for x
    x = 330,846,047.04/20,984.99
  6. Step 6: Final answer
    x = 15,765.85

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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.