Home / 20,402.58-30,600.35-5,409.80

Finding the Fourth Proportional to 20,402.58, 30,600.35 and 5,409.80

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Solution

The fourth proportional to 20,402.58, 30,600.35 and 5,409.80 is: 8,113.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.58 : 30,600.35 = 5,409.80 : x
  2. Step 2: Convert to fraction form
    20,402.58/30,600.35 = 5,409.80/x
  3. Step 3: Cross multiply
    20,402.58x = 30,600.35 × 5,409.80
  4. Step 4: Simplify right side
    20,402.58x = 165,541,773.43
  5. Step 5: Solve for x
    x = 165,541,773.43/20,402.58
  6. Step 6: Final answer
    x = 8,113.77

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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.