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Finding the Fourth Proportional to 12,653.28, 18,979.74 and 3,293.28

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Solution

The fourth proportional to 12,653.28, 18,979.74 and 3,293.28 is: 4,939.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.28 : 18,979.74 = 3,293.28 : x
  2. Step 2: Convert to fraction form
    12,653.28/18,979.74 = 3,293.28/x
  3. Step 3: Cross multiply
    12,653.28x = 18,979.74 × 3,293.28
  4. Step 4: Simplify right side
    12,653.28x = 62,505,598.15
  5. Step 5: Solve for x
    x = 62,505,598.15/12,653.28
  6. Step 6: Final answer
    x = 4,939.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.