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Finding the Fourth Proportional to 20,355.36, 30,528 and 8,667.36

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Solution

The fourth proportional to 20,355.36, 30,528 and 8,667.36 is: 12,998.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.36 : 30,528 = 8,667.36 : x
  2. Step 2: Convert to fraction form
    20,355.36/30,528 = 8,667.36/x
  3. Step 3: Cross multiply
    20,355.36x = 30,528 × 8,667.36
  4. Step 4: Simplify right side
    20,355.36x = 264,597,166.08
  5. Step 5: Solve for x
    x = 264,597,166.08/20,355.36
  6. Step 6: Final answer
    x = 12,998.89

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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.