Home / 20,515.60-30,773.40-19,219.60

Finding the Fourth Proportional to 20,515.60, 30,773.40 and 19,219.60

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Solution

The fourth proportional to 20,515.60, 30,773.40 and 19,219.60 is: 28,829.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.60 : 30,773.40 = 19,219.60 : x
  2. Step 2: Convert to fraction form
    20,515.60/30,773.40 = 19,219.60/x
  3. Step 3: Cross multiply
    20,515.60x = 30,773.40 × 19,219.60
  4. Step 4: Simplify right side
    20,515.60x = 591,452,438.64
  5. Step 5: Solve for x
    x = 591,452,438.64/20,515.60
  6. Step 6: Final answer
    x = 28,829.40

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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.