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Finding the Fourth Proportional to 9,383.90, 12,880.80 and 8,297.87

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Solution

The fourth proportional to 9,383.90, 12,880.80 and 8,297.87 is: 11,390.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,383.90 : 12,880.80 = 8,297.87 : x
  2. Step 2: Convert to fraction form
    9,383.90/12,880.80 = 8,297.87/x
  3. Step 3: Cross multiply
    9,383.90x = 12,880.80 × 8,297.87
  4. Step 4: Simplify right side
    9,383.90x = 106,883,152.38
  5. Step 5: Solve for x
    x = 106,883,152.38/9,383.90
  6. Step 6: Final answer
    x = 11,390.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.