Home / 30,520.44-42,123.18-18,255.03

Finding the Fourth Proportional to 30,520.44, 42,123.18 and 18,255.03

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Solution

The fourth proportional to 30,520.44, 42,123.18 and 18,255.03 is: 25,194.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,520.44 : 42,123.18 = 18,255.03 : x
  2. Step 2: Convert to fraction form
    30,520.44/42,123.18 = 18,255.03/x
  3. Step 3: Cross multiply
    30,520.44x = 42,123.18 × 18,255.03
  4. Step 4: Simplify right side
    30,520.44x = 768,959,914.60
  5. Step 5: Solve for x
    x = 768,959,914.60/30,520.44
  6. Step 6: Final answer
    x = 25,194.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.