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Finding the Fourth Proportional to 20,603.64, 30,886.94 and 7,453.02

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Solution

The fourth proportional to 20,603.64, 30,886.94 and 7,453.02 is: 11,172.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.64 : 30,886.94 = 7,453.02 : x
  2. Step 2: Convert to fraction form
    20,603.64/30,886.94 = 7,453.02/x
  3. Step 3: Cross multiply
    20,603.64x = 30,886.94 × 7,453.02
  4. Step 4: Simplify right side
    20,603.64x = 230,200,981.56
  5. Step 5: Solve for x
    x = 230,200,981.56/20,603.64
  6. Step 6: Final answer
    x = 11,172.83

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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.