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Finding the Fourth Proportional to 30,379.86, 45,572.22 and 9,321.48

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Solution

The fourth proportional to 30,379.86, 45,572.22 and 9,321.48 is: 13,982.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,379.86 : 45,572.22 = 9,321.48 : x
  2. Step 2: Convert to fraction form
    30,379.86/45,572.22 = 9,321.48/x
  3. Step 3: Cross multiply
    30,379.86x = 45,572.22 × 9,321.48
  4. Step 4: Simplify right side
    30,379.86x = 424,800,537.29
  5. Step 5: Solve for x
    x = 424,800,537.29/30,379.86
  6. Step 6: Final answer
    x = 13,982.97

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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.