Home / 20,431.80-30,647.70-7,284.60

Finding the Fourth Proportional to 20,431.80, 30,647.70 and 7,284.60

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Solution

The fourth proportional to 20,431.80, 30,647.70 and 7,284.60 is: 10,926.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.80 : 30,647.70 = 7,284.60 : x
  2. Step 2: Convert to fraction form
    20,431.80/30,647.70 = 7,284.60/x
  3. Step 3: Cross multiply
    20,431.80x = 30,647.70 × 7,284.60
  4. Step 4: Simplify right side
    20,431.80x = 223,256,235.42
  5. Step 5: Solve for x
    x = 223,256,235.42/20,431.80
  6. Step 6: Final answer
    x = 10,926.90

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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.