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Finding the Fourth Proportional to 18,668.16, 27,979.98 and 13,015.26

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Solution

The fourth proportional to 18,668.16, 27,979.98 and 13,015.26 is: 19,507.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.16 : 27,979.98 = 13,015.26 : x
  2. Step 2: Convert to fraction form
    18,668.16/27,979.98 = 13,015.26/x
  3. Step 3: Cross multiply
    18,668.16x = 27,979.98 × 13,015.26
  4. Step 4: Simplify right side
    18,668.16x = 364,166,714.49
  5. Step 5: Solve for x
    x = 364,166,714.49/18,668.16
  6. Step 6: Final answer
    x = 19,507.37

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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.