Home / 20,123.80-30,185.70-15,166.60

Finding the Fourth Proportional to 20,123.80, 30,185.70 and 15,166.60

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Solution

The fourth proportional to 20,123.80, 30,185.70 and 15,166.60 is: 22,749.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.80 : 30,185.70 = 15,166.60 : x
  2. Step 2: Convert to fraction form
    20,123.80/30,185.70 = 15,166.60/x
  3. Step 3: Cross multiply
    20,123.80x = 30,185.70 × 15,166.60
  4. Step 4: Simplify right side
    20,123.80x = 457,814,437.62
  5. Step 5: Solve for x
    x = 457,814,437.62/20,123.80
  6. Step 6: Final answer
    x = 22,749.90

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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.