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Finding the Fourth Proportional to 8,665.90, 11,958.94 and 4,889.06

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Solution

The fourth proportional to 8,665.90, 11,958.94 and 4,889.06 is: 6,746.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.90 : 11,958.94 = 4,889.06 : x
  2. Step 2: Convert to fraction form
    8,665.90/11,958.94 = 4,889.06/x
  3. Step 3: Cross multiply
    8,665.90x = 11,958.94 × 4,889.06
  4. Step 4: Simplify right side
    8,665.90x = 58,467,975.20
  5. Step 5: Solve for x
    x = 58,467,975.20/8,665.90
  6. Step 6: Final answer
    x = 6,746.90

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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.