Home / 20,968.20-28,921-12,012.44

Finding the Fourth Proportional to 20,968.20, 28,921 and 12,012.44

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Solution

The fourth proportional to 20,968.20, 28,921 and 12,012.44 is: 16,568.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.20 : 28,921 = 12,012.44 : x
  2. Step 2: Convert to fraction form
    20,968.20/28,921 = 12,012.44/x
  3. Step 3: Cross multiply
    20,968.20x = 28,921 × 12,012.44
  4. Step 4: Simplify right side
    20,968.20x = 347,411,777.24
  5. Step 5: Solve for x
    x = 347,411,777.24/20,968.20
  6. Step 6: Final answer
    x = 16,568.51

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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.