Home / 7,679.38-11,518.59-3,780.34

Finding the Fourth Proportional to 7,679.38, 11,518.59 and 3,780.34

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Solution

The fourth proportional to 7,679.38, 11,518.59 and 3,780.34 is: 5,670.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.38 : 11,518.59 = 3,780.34 : x
  2. Step 2: Convert to fraction form
    7,679.38/11,518.59 = 3,780.34/x
  3. Step 3: Cross multiply
    7,679.38x = 11,518.59 × 3,780.34
  4. Step 4: Simplify right side
    7,679.38x = 43,544,186.52
  5. Step 5: Solve for x
    x = 43,544,186.52/7,679.38
  6. Step 6: Final answer
    x = 5,670.27

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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.