Home / 13,986.20-20,936.10-8,125.40

Finding the Fourth Proportional to 13,986.20, 20,936.10 and 8,125.40

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Solution

The fourth proportional to 13,986.20, 20,936.10 and 8,125.40 is: 12,163.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.20 : 20,936.10 = 8,125.40 : x
  2. Step 2: Convert to fraction form
    13,986.20/20,936.10 = 8,125.40/x
  3. Step 3: Cross multiply
    13,986.20x = 20,936.10 × 8,125.40
  4. Step 4: Simplify right side
    13,986.20x = 170,114,186.94
  5. Step 5: Solve for x
    x = 170,114,186.94/13,986.20
  6. Step 6: Final answer
    x = 12,163.00

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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.