Home / 13,485.40-20,228.10-8,819.80

Finding the Fourth Proportional to 13,485.40, 20,228.10 and 8,819.80

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Solution

The fourth proportional to 13,485.40, 20,228.10 and 8,819.80 is: 13,229.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.40 : 20,228.10 = 8,819.80 : x
  2. Step 2: Convert to fraction form
    13,485.40/20,228.10 = 8,819.80/x
  3. Step 3: Cross multiply
    13,485.40x = 20,228.10 × 8,819.80
  4. Step 4: Simplify right side
    13,485.40x = 178,407,796.38
  5. Step 5: Solve for x
    x = 178,407,796.38/13,485.40
  6. Step 6: Final answer
    x = 13,229.70

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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.