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Finding the Fourth Proportional to 9,289.64, 12,822.77 and 8,305.49

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Solution

The fourth proportional to 9,289.64, 12,822.77 and 8,305.49 is: 11,464.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,289.64 : 12,822.77 = 8,305.49 : x
  2. Step 2: Convert to fraction form
    9,289.64/12,822.77 = 8,305.49/x
  3. Step 3: Cross multiply
    9,289.64x = 12,822.77 × 8,305.49
  4. Step 4: Simplify right side
    9,289.64x = 106,499,388.01
  5. Step 5: Solve for x
    x = 106,499,388.01/9,289.64
  6. Step 6: Final answer
    x = 11,464.32

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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.