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Finding the Fourth Proportional to 30,603.20, 45,817.20 and 18,837.20

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Solution

The fourth proportional to 30,603.20, 45,817.20 and 18,837.20 is: 28,201.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,603.20 : 45,817.20 = 18,837.20 : x
  2. Step 2: Convert to fraction form
    30,603.20/45,817.20 = 18,837.20/x
  3. Step 3: Cross multiply
    30,603.20x = 45,817.20 × 18,837.20
  4. Step 4: Simplify right side
    30,603.20x = 863,067,759.84
  5. Step 5: Solve for x
    x = 863,067,759.84/30,603.20
  6. Step 6: Final answer
    x = 28,201.88

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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.