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Finding the Fourth Proportional to 13,793.90, 20,699.40 and 7,224.80

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Solution

The fourth proportional to 13,793.90, 20,699.40 and 7,224.80 is: 10,841.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,793.90 : 20,699.40 = 7,224.80 : x
  2. Step 2: Convert to fraction form
    13,793.90/20,699.40 = 7,224.80/x
  3. Step 3: Cross multiply
    13,793.90x = 20,699.40 × 7,224.80
  4. Step 4: Simplify right side
    13,793.90x = 149,549,025.12
  5. Step 5: Solve for x
    x = 149,549,025.12/13,793.90
  6. Step 6: Final answer
    x = 10,841.68

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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.