Home / 13,620.40-20,425.80-4,855.60

Finding the Fourth Proportional to 13,620.40, 20,425.80 and 4,855.60

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Solution

The fourth proportional to 13,620.40, 20,425.80 and 4,855.60 is: 7,281.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.40 : 20,425.80 = 4,855.60 : x
  2. Step 2: Convert to fraction form
    13,620.40/20,425.80 = 4,855.60/x
  3. Step 3: Cross multiply
    13,620.40x = 20,425.80 × 4,855.60
  4. Step 4: Simplify right side
    13,620.40x = 99,179,514.48
  5. Step 5: Solve for x
    x = 99,179,514.48/13,620.40
  6. Step 6: Final answer
    x = 7,281.69

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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.