Home / 20,143.64-30,212.98-10,290.04

Finding the Fourth Proportional to 20,143.64, 30,212.98 and 10,290.04

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Solution

The fourth proportional to 20,143.64, 30,212.98 and 10,290.04 is: 15,433.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.64 : 30,212.98 = 10,290.04 : x
  2. Step 2: Convert to fraction form
    20,143.64/30,212.98 = 10,290.04/x
  3. Step 3: Cross multiply
    20,143.64x = 30,212.98 × 10,290.04
  4. Step 4: Simplify right side
    20,143.64x = 310,892,772.72
  5. Step 5: Solve for x
    x = 310,892,772.72/20,143.64
  6. Step 6: Final answer
    x = 15,433.79

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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.