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Finding the Fourth Proportional to 20,488.76, 30,736.37 and 7,340.84

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Solution

The fourth proportional to 20,488.76, 30,736.37 and 7,340.84 is: 11,012.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.76 : 30,736.37 = 7,340.84 : x
  2. Step 2: Convert to fraction form
    20,488.76/30,736.37 = 7,340.84/x
  3. Step 3: Cross multiply
    20,488.76x = 30,736.37 × 7,340.84
  4. Step 4: Simplify right side
    20,488.76x = 225,630,583.96
  5. Step 5: Solve for x
    x = 225,630,583.96/20,488.76
  6. Step 6: Final answer
    x = 11,012.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.