Home / 20,933.90-28,890.38-11,984.21

Finding the Fourth Proportional to 20,933.90, 28,890.38 and 11,984.21

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Solution

The fourth proportional to 20,933.90, 28,890.38 and 11,984.21 is: 16,539.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.90 : 28,890.38 = 11,984.21 : x
  2. Step 2: Convert to fraction form
    20,933.90/28,890.38 = 11,984.21/x
  3. Step 3: Cross multiply
    20,933.90x = 28,890.38 × 11,984.21
  4. Step 4: Simplify right side
    20,933.90x = 346,228,266.41
  5. Step 5: Solve for x
    x = 346,228,266.41/20,933.90
  6. Step 6: Final answer
    x = 16,539.12

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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.