Home / 20,262.10-30,378.80-7,771.60

Finding the Fourth Proportional to 20,262.10, 30,378.80 and 7,771.60

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Solution

The fourth proportional to 20,262.10, 30,378.80 and 7,771.60 is: 11,651.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,262.10 : 30,378.80 = 7,771.60 : x
  2. Step 2: Convert to fraction form
    20,262.10/30,378.80 = 7,771.60/x
  3. Step 3: Cross multiply
    20,262.10x = 30,378.80 × 7,771.60
  4. Step 4: Simplify right side
    20,262.10x = 236,091,724.89
  5. Step 5: Solve for x
    x = 236,091,724.89/20,262.10
  6. Step 6: Final answer
    x = 11,651.89

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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.