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Finding the Fourth Proportional to 7,955.42, 10,978.82 and 4,418.63

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Solution

The fourth proportional to 7,955.42, 10,978.82 and 4,418.63 is: 6,097.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,955.42 : 10,978.82 = 4,418.63 : x
  2. Step 2: Convert to fraction form
    7,955.42/10,978.82 = 4,418.63/x
  3. Step 3: Cross multiply
    7,955.42x = 10,978.82 × 4,418.63
  4. Step 4: Simplify right side
    7,955.42x = 48,511,266.43
  5. Step 5: Solve for x
    x = 48,511,266.43/7,955.42
  6. Step 6: Final answer
    x = 6,097.89

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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.