Home / 20,622.20-28,458.74-11,190.76

Finding the Fourth Proportional to 20,622.20, 28,458.74 and 11,190.76

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Solution

The fourth proportional to 20,622.20, 28,458.74 and 11,190.76 is: 15,443.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.20 : 28,458.74 = 11,190.76 : x
  2. Step 2: Convert to fraction form
    20,622.20/28,458.74 = 11,190.76/x
  3. Step 3: Cross multiply
    20,622.20x = 28,458.74 × 11,190.76
  4. Step 4: Simplify right side
    20,622.20x = 318,474,886.07
  5. Step 5: Solve for x
    x = 318,474,886.07/20,622.20
  6. Step 6: Final answer
    x = 15,443.31

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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.