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Finding the Fourth Proportional to 19,931.90, 29,877.34 and 8,843.81

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Solution

The fourth proportional to 19,931.90, 29,877.34 and 8,843.81 is: 13,256.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.90 : 29,877.34 = 8,843.81 : x
  2. Step 2: Convert to fraction form
    19,931.90/29,877.34 = 8,843.81/x
  3. Step 3: Cross multiply
    19,931.90x = 29,877.34 × 8,843.81
  4. Step 4: Simplify right side
    19,931.90x = 264,229,518.27
  5. Step 5: Solve for x
    x = 264,229,518.27/19,931.90
  6. Step 6: Final answer
    x = 13,256.61

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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.