Home / 20,865.03-28,793.76-11,433.60

Finding the Fourth Proportional to 20,865.03, 28,793.76 and 11,433.60

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Solution

The fourth proportional to 20,865.03, 28,793.76 and 11,433.60 is: 15,778.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.03 : 28,793.76 = 11,433.60 : x
  2. Step 2: Convert to fraction form
    20,865.03/28,793.76 = 11,433.60/x
  3. Step 3: Cross multiply
    20,865.03x = 28,793.76 × 11,433.60
  4. Step 4: Simplify right side
    20,865.03x = 329,216,133.20
  5. Step 5: Solve for x
    x = 329,216,133.20/20,865.03
  6. Step 6: Final answer
    x = 15,778.37

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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.