Home / 13,941.90-20,912.85-9,786.60

Finding the Fourth Proportional to 13,941.90, 20,912.85 and 9,786.60

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Solution

The fourth proportional to 13,941.90, 20,912.85 and 9,786.60 is: 14,679.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,941.90 : 20,912.85 = 9,786.60 : x
  2. Step 2: Convert to fraction form
    13,941.90/20,912.85 = 9,786.60/x
  3. Step 3: Cross multiply
    13,941.90x = 20,912.85 × 9,786.60
  4. Step 4: Simplify right side
    13,941.90x = 204,665,697.81
  5. Step 5: Solve for x
    x = 204,665,697.81/13,941.90
  6. Step 6: Final answer
    x = 14,679.90

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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.