Home / 20,620.26-28,455.84-11,188.62

Finding the Fourth Proportional to 20,620.26, 28,455.84 and 11,188.62

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Solution

The fourth proportional to 20,620.26, 28,455.84 and 11,188.62 is: 15,440.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.26 : 28,455.84 = 11,188.62 : x
  2. Step 2: Convert to fraction form
    20,620.26/28,455.84 = 11,188.62/x
  3. Step 3: Cross multiply
    20,620.26x = 28,455.84 × 11,188.62
  4. Step 4: Simplify right side
    20,620.26x = 318,381,580.54
  5. Step 5: Solve for x
    x = 318,381,580.54/20,620.26
  6. Step 6: Final answer
    x = 15,440.23

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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.