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Finding the Fourth Proportional to 12,889.16, 19,358.33 and 7,968.41

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Solution

The fourth proportional to 12,889.16, 19,358.33 and 7,968.41 is: 11,967.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.16 : 19,358.33 = 7,968.41 : x
  2. Step 2: Convert to fraction form
    12,889.16/19,358.33 = 7,968.41/x
  3. Step 3: Cross multiply
    12,889.16x = 19,358.33 × 7,968.41
  4. Step 4: Simplify right side
    12,889.16x = 154,254,973.72
  5. Step 5: Solve for x
    x = 154,254,973.72/12,889.16
  6. Step 6: Final answer
    x = 11,967.81

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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.