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Finding the Fourth Proportional to 20,553.94, 30,830.91 and 8,709.58

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Solution

The fourth proportional to 20,553.94, 30,830.91 and 8,709.58 is: 13,064.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.94 : 30,830.91 = 8,709.58 : x
  2. Step 2: Convert to fraction form
    20,553.94/30,830.91 = 8,709.58/x
  3. Step 3: Cross multiply
    20,553.94x = 30,830.91 × 8,709.58
  4. Step 4: Simplify right side
    20,553.94x = 268,524,277.12
  5. Step 5: Solve for x
    x = 268,524,277.12/20,553.94
  6. Step 6: Final answer
    x = 13,064.37

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1.5x scale

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.