Home / 20,304.72-30,431.76-10,921.44

Finding the Fourth Proportional to 20,304.72, 30,431.76 and 10,921.44

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Solution

The fourth proportional to 20,304.72, 30,431.76 and 10,921.44 is: 16,368.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,304.72 : 30,431.76 = 10,921.44 : x
  2. Step 2: Convert to fraction form
    20,304.72/30,431.76 = 10,921.44/x
  3. Step 3: Cross multiply
    20,304.72x = 30,431.76 × 10,921.44
  4. Step 4: Simplify right side
    20,304.72x = 332,358,640.93
  5. Step 5: Solve for x
    x = 332,358,640.93/20,304.72
  6. Step 6: Final answer
    x = 16,368.54

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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.