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Finding the Fourth Proportional to 8,993.60, 12,387.36 and 8,939.84

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Solution

The fourth proportional to 8,993.60, 12,387.36 and 8,939.84 is: 12,313.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,993.60 : 12,387.36 = 8,939.84 : x
  2. Step 2: Convert to fraction form
    8,993.60/12,387.36 = 8,939.84/x
  3. Step 3: Cross multiply
    8,993.60x = 12,387.36 × 8,939.84
  4. Step 4: Simplify right side
    8,993.60x = 110,741,016.42
  5. Step 5: Solve for x
    x = 110,741,016.42/8,993.60
  6. Step 6: Final answer
    x = 12,313.31

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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.