Home / 7,918.78-11,819.68-6,984.92

Finding the Fourth Proportional to 7,918.78, 11,819.68 and 6,984.92

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Solution

The fourth proportional to 7,918.78, 11,819.68 and 6,984.92 is: 10,425.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,918.78 : 11,819.68 = 6,984.92 : x
  2. Step 2: Convert to fraction form
    7,918.78/11,819.68 = 6,984.92/x
  3. Step 3: Cross multiply
    7,918.78x = 11,819.68 × 6,984.92
  4. Step 4: Simplify right side
    7,918.78x = 82,559,519.23
  5. Step 5: Solve for x
    x = 82,559,519.23/7,918.78
  6. Step 6: Final answer
    x = 10,425.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.