Home / 20,620.07-28,456.03-11,188.63

Finding the Fourth Proportional to 20,620.07, 28,456.03 and 11,188.63

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Solution

The fourth proportional to 20,620.07, 28,456.03 and 11,188.63 is: 15,440.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.07 : 28,456.03 = 11,188.63 : x
  2. Step 2: Convert to fraction form
    20,620.07/28,456.03 = 11,188.63/x
  3. Step 3: Cross multiply
    20,620.07x = 28,456.03 × 11,188.63
  4. Step 4: Simplify right side
    20,620.07x = 318,383,977.56
  5. Step 5: Solve for x
    x = 318,383,977.56/20,620.07
  6. Step 6: Final answer
    x = 15,440.49

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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.