Home / 21,870.26-30,183.38-12,310.43

Finding the Fourth Proportional to 21,870.26, 30,183.38 and 12,310.43

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Solution

The fourth proportional to 21,870.26, 30,183.38 and 12,310.43 is: 16,989.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,870.26 : 30,183.38 = 12,310.43 : x
  2. Step 2: Convert to fraction form
    21,870.26/30,183.38 = 12,310.43/x
  3. Step 3: Cross multiply
    21,870.26x = 30,183.38 × 12,310.43
  4. Step 4: Simplify right side
    21,870.26x = 371,570,174.18
  5. Step 5: Solve for x
    x = 371,570,174.18/21,870.26
  6. Step 6: Final answer
    x = 16,989.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.