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Finding the Fourth Proportional to 20,271, 30,381.54 and 14,395.80

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Solution

The fourth proportional to 20,271, 30,381.54 and 14,395.80 is: 21,575.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271 : 30,381.54 = 14,395.80 : x
  2. Step 2: Convert to fraction form
    20,271/30,381.54 = 14,395.80/x
  3. Step 3: Cross multiply
    20,271x = 30,381.54 × 14,395.80
  4. Step 4: Simplify right side
    20,271x = 437,366,573.53
  5. Step 5: Solve for x
    x = 437,366,573.53/20,271
  6. Step 6: Final answer
    x = 21,575.97

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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.