Home / 20,405.40-30,556.26-11,160.60

Finding the Fourth Proportional to 20,405.40, 30,556.26 and 11,160.60

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Solution

The fourth proportional to 20,405.40, 30,556.26 and 11,160.60 is: 16,712.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.40 : 30,556.26 = 11,160.60 : x
  2. Step 2: Convert to fraction form
    20,405.40/30,556.26 = 11,160.60/x
  3. Step 3: Cross multiply
    20,405.40x = 30,556.26 × 11,160.60
  4. Step 4: Simplify right side
    20,405.40x = 341,026,195.36
  5. Step 5: Solve for x
    x = 341,026,195.36/20,405.40
  6. Step 6: Final answer
    x = 16,712.55

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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.