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Finding the Fourth Proportional to 6,479.78, 9,719.70 and 3,556.48

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Solution

The fourth proportional to 6,479.78, 9,719.70 and 3,556.48 is: 5,334.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.78 : 9,719.70 = 3,556.48 : x
  2. Step 2: Convert to fraction form
    6,479.78/9,719.70 = 3,556.48/x
  3. Step 3: Cross multiply
    6,479.78x = 9,719.70 × 3,556.48
  4. Step 4: Simplify right side
    6,479.78x = 34,567,918.66
  5. Step 5: Solve for x
    x = 34,567,918.66/6,479.78
  6. Step 6: Final answer
    x = 5,334.74

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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.