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Finding the Fourth Proportional to 20,647.50, 28,500.03 and 13,195.50

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Solution

The fourth proportional to 20,647.50, 28,500.03 and 13,195.50 is: 18,213.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.50 : 28,500.03 = 13,195.50 : x
  2. Step 2: Convert to fraction form
    20,647.50/28,500.03 = 13,195.50/x
  3. Step 3: Cross multiply
    20,647.50x = 28,500.03 × 13,195.50
  4. Step 4: Simplify right side
    20,647.50x = 376,072,145.87
  5. Step 5: Solve for x
    x = 376,072,145.87/20,647.50
  6. Step 6: Final answer
    x = 18,213.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.