Home / 9,986.40-13,785.12-8,936.64

Finding the Fourth Proportional to 9,986.40, 13,785.12 and 8,936.64

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Solution

The fourth proportional to 9,986.40, 13,785.12 and 8,936.64 is: 12,336.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,986.40 : 13,785.12 = 8,936.64 : x
  2. Step 2: Convert to fraction form
    9,986.40/13,785.12 = 8,936.64/x
  3. Step 3: Cross multiply
    9,986.40x = 13,785.12 × 8,936.64
  4. Step 4: Simplify right side
    9,986.40x = 123,192,654.80
  5. Step 5: Solve for x
    x = 123,192,654.80/9,986.40
  6. Step 6: Final answer
    x = 12,336.04

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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.