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Finding the Fourth Proportional to 8,905.08, 12,290.46 and 8,511.36

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Solution

The fourth proportional to 8,905.08, 12,290.46 and 8,511.36 is: 11,747.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.08 : 12,290.46 = 8,511.36 : x
  2. Step 2: Convert to fraction form
    8,905.08/12,290.46 = 8,511.36/x
  3. Step 3: Cross multiply
    8,905.08x = 12,290.46 × 8,511.36
  4. Step 4: Simplify right side
    8,905.08x = 104,608,529.63
  5. Step 5: Solve for x
    x = 104,608,529.63/8,905.08
  6. Step 6: Final answer
    x = 11,747.06

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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.