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Finding the Fourth Proportional to 9,365.06, 12,940.90 and 8,909.58

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Solution

The fourth proportional to 9,365.06, 12,940.90 and 8,909.58 is: 12,311.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,365.06 : 12,940.90 = 8,909.58 : x
  2. Step 2: Convert to fraction form
    9,365.06/12,940.90 = 8,909.58/x
  3. Step 3: Cross multiply
    9,365.06x = 12,940.90 × 8,909.58
  4. Step 4: Simplify right side
    9,365.06x = 115,297,983.82
  5. Step 5: Solve for x
    x = 115,297,983.82/9,365.06
  6. Step 6: Final answer
    x = 12,311.51

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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.