Home / 13,428.80-20,118.90-8,228.60

Finding the Fourth Proportional to 13,428.80, 20,118.90 and 8,228.60

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Solution

The fourth proportional to 13,428.80, 20,118.90 and 8,228.60 is: 12,328.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.80 : 20,118.90 = 8,228.60 : x
  2. Step 2: Convert to fraction form
    13,428.80/20,118.90 = 8,228.60/x
  3. Step 3: Cross multiply
    13,428.80x = 20,118.90 × 8,228.60
  4. Step 4: Simplify right side
    13,428.80x = 165,550,380.54
  5. Step 5: Solve for x
    x = 165,550,380.54/13,428.80
  6. Step 6: Final answer
    x = 12,328.01

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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.