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Finding the Fourth Proportional to 20,099.99, 30,125.94 and 6,945.05

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Solution

The fourth proportional to 20,099.99, 30,125.94 and 6,945.05 is: 10,409.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,099.99 : 30,125.94 = 6,945.05 : x
  2. Step 2: Convert to fraction form
    20,099.99/30,125.94 = 6,945.05/x
  3. Step 3: Cross multiply
    20,099.99x = 30,125.94 × 6,945.05
  4. Step 4: Simplify right side
    20,099.99x = 209,226,008.97
  5. Step 5: Solve for x
    x = 209,226,008.97/20,099.99
  6. Step 6: Final answer
    x = 10,409.26

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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.