Home / 20,519.60-30,779.40-19,223.60

Finding the Fourth Proportional to 20,519.60, 30,779.40 and 19,223.60

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Solution

The fourth proportional to 20,519.60, 30,779.40 and 19,223.60 is: 28,835.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.60 : 30,779.40 = 19,223.60 : x
  2. Step 2: Convert to fraction form
    20,519.60/30,779.40 = 19,223.60/x
  3. Step 3: Cross multiply
    20,519.60x = 30,779.40 × 19,223.60
  4. Step 4: Simplify right side
    20,519.60x = 591,690,873.84
  5. Step 5: Solve for x
    x = 591,690,873.84/20,519.60
  6. Step 6: Final answer
    x = 28,835.40

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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.