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Finding the Fourth Proportional to 20,554.89, 30,813.47 and 7,404.08

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Solution

The fourth proportional to 20,554.89, 30,813.47 and 7,404.08 is: 11,099.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.89 : 30,813.47 = 7,404.08 : x
  2. Step 2: Convert to fraction form
    20,554.89/30,813.47 = 7,404.08/x
  3. Step 3: Cross multiply
    20,554.89x = 30,813.47 × 7,404.08
  4. Step 4: Simplify right side
    20,554.89x = 228,145,205.87
  5. Step 5: Solve for x
    x = 228,145,205.87/20,554.89
  6. Step 6: Final answer
    x = 11,099.32

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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.