Home / 20,191.72-30,307.02-18,918.44

Finding the Fourth Proportional to 20,191.72, 30,307.02 and 18,918.44

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Solution

The fourth proportional to 20,191.72, 30,307.02 and 18,918.44 is: 28,395.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.72 : 30,307.02 = 18,918.44 : x
  2. Step 2: Convert to fraction form
    20,191.72/30,307.02 = 18,918.44/x
  3. Step 3: Cross multiply
    20,191.72x = 30,307.02 × 18,918.44
  4. Step 4: Simplify right side
    20,191.72x = 573,361,539.45
  5. Step 5: Solve for x
    x = 573,361,539.45/20,191.72
  6. Step 6: Final answer
    x = 28,395.87

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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.