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Finding the Fourth Proportional to 30,485.30, 45,742.52 and 18,821.30

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Solution

The fourth proportional to 30,485.30, 45,742.52 and 18,821.30 is: 28,240.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,485.30 : 45,742.52 = 18,821.30 : x
  2. Step 2: Convert to fraction form
    30,485.30/45,742.52 = 18,821.30/x
  3. Step 3: Cross multiply
    30,485.30x = 45,742.52 × 18,821.30
  4. Step 4: Simplify right side
    30,485.30x = 860,933,510.02
  5. Step 5: Solve for x
    x = 860,933,510.02/30,485.30
  6. Step 6: Final answer
    x = 28,240.94

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