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Finding the Fourth Proportional to 20,440.76, 30,661.07 and 5,649.57

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Solution

The fourth proportional to 20,440.76, 30,661.07 and 5,649.57 is: 8,474.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.76 : 30,661.07 = 5,649.57 : x
  2. Step 2: Convert to fraction form
    20,440.76/30,661.07 = 5,649.57/x
  3. Step 3: Cross multiply
    20,440.76x = 30,661.07 × 5,649.57
  4. Step 4: Simplify right side
    20,440.76x = 173,221,832.99
  5. Step 5: Solve for x
    x = 173,221,832.99/20,440.76
  6. Step 6: Final answer
    x = 8,474.34

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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.