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Finding the Fourth Proportional to 20,146.90, 30,183.90 and 17,230.90

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Solution

The fourth proportional to 20,146.90, 30,183.90 and 17,230.90 is: 25,815.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,146.90 : 30,183.90 = 17,230.90 : x
  2. Step 2: Convert to fraction form
    20,146.90/30,183.90 = 17,230.90/x
  3. Step 3: Cross multiply
    20,146.90x = 30,183.90 × 17,230.90
  4. Step 4: Simplify right side
    20,146.90x = 520,095,762.51
  5. Step 5: Solve for x
    x = 520,095,762.51/20,146.90
  6. Step 6: Final answer
    x = 25,815.18

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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.