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Finding the Fourth Proportional to 19,379.16, 29,016.52 and 12,321

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Solution

The fourth proportional to 19,379.16, 29,016.52 and 12,321 is: 18,448.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,379.16 : 29,016.52 = 12,321 : x
  2. Step 2: Convert to fraction form
    19,379.16/29,016.52 = 12,321/x
  3. Step 3: Cross multiply
    19,379.16x = 29,016.52 × 12,321
  4. Step 4: Simplify right side
    19,379.16x = 357,512,542.92
  5. Step 5: Solve for x
    x = 357,512,542.92/19,379.16
  6. Step 6: Final answer
    x = 18,448.30

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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.