Home / 20,768.58-31,152.48-7,620.84

Finding the Fourth Proportional to 20,768.58, 31,152.48 and 7,620.84

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Solution

The fourth proportional to 20,768.58, 31,152.48 and 7,620.84 is: 11,431.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.58 : 31,152.48 = 7,620.84 : x
  2. Step 2: Convert to fraction form
    20,768.58/31,152.48 = 7,620.84/x
  3. Step 3: Cross multiply
    20,768.58x = 31,152.48 × 7,620.84
  4. Step 4: Simplify right side
    20,768.58x = 237,408,065.68
  5. Step 5: Solve for x
    x = 237,408,065.68/20,768.58
  6. Step 6: Final answer
    x = 11,431.12

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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.