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Finding the Fourth Proportional to 20,245.87, 30,368.76 and 7,091.02

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Solution

The fourth proportional to 20,245.87, 30,368.76 and 7,091.02 is: 10,636.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,245.87 : 30,368.76 = 7,091.02 : x
  2. Step 2: Convert to fraction form
    20,245.87/30,368.76 = 7,091.02/x
  3. Step 3: Cross multiply
    20,245.87x = 30,368.76 × 7,091.02
  4. Step 4: Simplify right side
    20,245.87x = 215,345,484.54
  5. Step 5: Solve for x
    x = 215,345,484.54/20,245.87
  6. Step 6: Final answer
    x = 10,636.51

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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.