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Finding the Fourth Proportional to 17,815.25, 26,722.84 and 7,146.42

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Solution

The fourth proportional to 17,815.25, 26,722.84 and 7,146.42 is: 10,719.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,815.25 : 26,722.84 = 7,146.42 : x
  2. Step 2: Convert to fraction form
    17,815.25/26,722.84 = 7,146.42/x
  3. Step 3: Cross multiply
    17,815.25x = 26,722.84 × 7,146.42
  4. Step 4: Simplify right side
    17,815.25x = 190,972,638.23
  5. Step 5: Solve for x
    x = 190,972,638.23/17,815.25
  6. Step 6: Final answer
    x = 10,719.62

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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.