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Finding the Fourth Proportional to 18,376.60, 27,556.80 and 7,279.60

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Solution

The fourth proportional to 18,376.60, 27,556.80 and 7,279.60 is: 10,916.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,376.60 : 27,556.80 = 7,279.60 : x
  2. Step 2: Convert to fraction form
    18,376.60/27,556.80 = 7,279.60/x
  3. Step 3: Cross multiply
    18,376.60x = 27,556.80 × 7,279.60
  4. Step 4: Simplify right side
    18,376.60x = 200,602,481.28
  5. Step 5: Solve for x
    x = 200,602,481.28/18,376.60
  6. Step 6: Final answer
    x = 10,916.19

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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.