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Finding the Fourth Proportional to 9,662.40, 13,337.28 and 8,816.64

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Solution

The fourth proportional to 9,662.40, 13,337.28 and 8,816.64 is: 12,169.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,662.40 : 13,337.28 = 8,816.64 : x
  2. Step 2: Convert to fraction form
    9,662.40/13,337.28 = 8,816.64/x
  3. Step 3: Cross multiply
    9,662.40x = 13,337.28 × 8,816.64
  4. Step 4: Simplify right side
    9,662.40x = 117,589,996.34
  5. Step 5: Solve for x
    x = 117,589,996.34/9,662.40
  6. Step 6: Final answer
    x = 12,169.85

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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.