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Finding the Fourth Proportional to 18,653.79, 27,979.74 and 6,966.09

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Solution

The fourth proportional to 18,653.79, 27,979.74 and 6,966.09 is: 10,448.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.79 : 27,979.74 = 6,966.09 : x
  2. Step 2: Convert to fraction form
    18,653.79/27,979.74 = 6,966.09/x
  3. Step 3: Cross multiply
    18,653.79x = 27,979.74 × 6,966.09
  4. Step 4: Simplify right side
    18,653.79x = 194,909,387.02
  5. Step 5: Solve for x
    x = 194,909,387.02/18,653.79
  6. Step 6: Final answer
    x = 10,448.78

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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.