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Finding the Fourth Proportional to 18,967.56, 28,435.27 and 7,867.32

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Solution

The fourth proportional to 18,967.56, 28,435.27 and 7,867.32 is: 11,794.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,967.56 : 28,435.27 = 7,867.32 : x
  2. Step 2: Convert to fraction form
    18,967.56/28,435.27 = 7,867.32/x
  3. Step 3: Cross multiply
    18,967.56x = 28,435.27 × 7,867.32
  4. Step 4: Simplify right side
    18,967.56x = 223,709,307.12
  5. Step 5: Solve for x
    x = 223,709,307.12/18,967.56
  6. Step 6: Final answer
    x = 11,794.31

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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.