Home / 20,400.80-30,536.40-18,845.60

Finding the Fourth Proportional to 20,400.80, 30,536.40 and 18,845.60

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Solution

The fourth proportional to 20,400.80, 30,536.40 and 18,845.60 is: 28,208.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.80 : 30,536.40 = 18,845.60 : x
  2. Step 2: Convert to fraction form
    20,400.80/30,536.40 = 18,845.60/x
  3. Step 3: Cross multiply
    20,400.80x = 30,536.40 × 18,845.60
  4. Step 4: Simplify right side
    20,400.80x = 575,476,779.84
  5. Step 5: Solve for x
    x = 575,476,779.84/20,400.80
  6. Step 6: Final answer
    x = 28,208.54

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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.