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Finding the Fourth Proportional to 13,794.90, 20,700.90 and 7,225.80

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Solution

The fourth proportional to 13,794.90, 20,700.90 and 7,225.80 is: 10,843.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,794.90 : 20,700.90 = 7,225.80 : x
  2. Step 2: Convert to fraction form
    13,794.90/20,700.90 = 7,225.80/x
  3. Step 3: Cross multiply
    13,794.90x = 20,700.90 × 7,225.80
  4. Step 4: Simplify right side
    13,794.90x = 149,580,563.22
  5. Step 5: Solve for x
    x = 149,580,563.22/13,794.90
  6. Step 6: Final answer
    x = 10,843.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.