Home / 20,951.03-28,912.91-11,391.46

Finding the Fourth Proportional to 20,951.03, 28,912.91 and 11,391.46

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Solution

The fourth proportional to 20,951.03, 28,912.91 and 11,391.46 is: 15,720.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.03 : 28,912.91 = 11,391.46 : x
  2. Step 2: Convert to fraction form
    20,951.03/28,912.91 = 11,391.46/x
  3. Step 3: Cross multiply
    20,951.03x = 28,912.91 × 11,391.46
  4. Step 4: Simplify right side
    20,951.03x = 329,360,056.23
  5. Step 5: Solve for x
    x = 329,360,056.23/20,951.03
  6. Step 6: Final answer
    x = 15,720.47

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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.