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Finding the Fourth Proportional to 20,660.56, 30,994.52 and 7,511.84

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Solution

The fourth proportional to 20,660.56, 30,994.52 and 7,511.84 is: 11,269.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.56 : 30,994.52 = 7,511.84 : x
  2. Step 2: Convert to fraction form
    20,660.56/30,994.52 = 7,511.84/x
  3. Step 3: Cross multiply
    20,660.56x = 30,994.52 × 7,511.84
  4. Step 4: Simplify right side
    20,660.56x = 232,825,875.12
  5. Step 5: Solve for x
    x = 232,825,875.12/20,660.56
  6. Step 6: Final answer
    x = 11,269.10

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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.