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Finding the Fourth Proportional to 30,270.44, 45,439.68 and 12,755

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Solution

The fourth proportional to 30,270.44, 45,439.68 and 12,755 is: 19,146.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,270.44 : 45,439.68 = 12,755 : x
  2. Step 2: Convert to fraction form
    30,270.44/45,439.68 = 12,755/x
  3. Step 3: Cross multiply
    30,270.44x = 45,439.68 × 12,755
  4. Step 4: Simplify right side
    30,270.44x = 579,583,118.40
  5. Step 5: Solve for x
    x = 579,583,118.40/30,270.44
  6. Step 6: Final answer
    x = 19,146.83

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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.