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Finding the Fourth Proportional to 6,612.88, 9,126.06 and 3,959.78

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Solution

The fourth proportional to 6,612.88, 9,126.06 and 3,959.78 is: 5,464.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,612.88 : 9,126.06 = 3,959.78 : x
  2. Step 2: Convert to fraction form
    6,612.88/9,126.06 = 3,959.78/x
  3. Step 3: Cross multiply
    6,612.88x = 9,126.06 × 3,959.78
  4. Step 4: Simplify right side
    6,612.88x = 36,137,189.87
  5. Step 5: Solve for x
    x = 36,137,189.87/6,612.88
  6. Step 6: Final answer
    x = 5,464.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.