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Finding the Fourth Proportional to 7,930.58, 11,889.86 and 4,809.78

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Solution

The fourth proportional to 7,930.58, 11,889.86 and 4,809.78 is: 7,211.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,930.58 : 11,889.86 = 4,809.78 : x
  2. Step 2: Convert to fraction form
    7,930.58/11,889.86 = 4,809.78/x
  3. Step 3: Cross multiply
    7,930.58x = 11,889.86 × 4,809.78
  4. Step 4: Simplify right side
    7,930.58x = 57,187,586.78
  5. Step 5: Solve for x
    x = 57,187,586.78/7,930.58
  6. Step 6: Final answer
    x = 7,211.03

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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.