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Finding the Fourth Proportional to 20,373.88, 30,555.88 and 7,885.96

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Solution

The fourth proportional to 20,373.88, 30,555.88 and 7,885.96 is: 11,827.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.88 : 30,555.88 = 7,885.96 : x
  2. Step 2: Convert to fraction form
    20,373.88/30,555.88 = 7,885.96/x
  3. Step 3: Cross multiply
    20,373.88x = 30,555.88 × 7,885.96
  4. Step 4: Simplify right side
    20,373.88x = 240,962,395.70
  5. Step 5: Solve for x
    x = 240,962,395.70/20,373.88
  6. Step 6: Final answer
    x = 11,827.03

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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.