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Finding the Fourth Proportional to 20,797.99, 31,200.05 and 7,649.39

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Solution

The fourth proportional to 20,797.99, 31,200.05 and 7,649.39 is: 11,475.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.99 : 31,200.05 = 7,649.39 : x
  2. Step 2: Convert to fraction form
    20,797.99/31,200.05 = 7,649.39/x
  3. Step 3: Cross multiply
    20,797.99x = 31,200.05 × 7,649.39
  4. Step 4: Simplify right side
    20,797.99x = 238,661,447.59
  5. Step 5: Solve for x
    x = 238,661,447.59/20,797.99
  6. Step 6: Final answer
    x = 11,475.22

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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.