Home / 20,729.59-28,611.45-13,174.45

Finding the Fourth Proportional to 20,729.59, 28,611.45 and 13,174.45

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Solution

The fourth proportional to 20,729.59, 28,611.45 and 13,174.45 is: 18,183.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.59 : 28,611.45 = 13,174.45 : x
  2. Step 2: Convert to fraction form
    20,729.59/28,611.45 = 13,174.45/x
  3. Step 3: Cross multiply
    20,729.59x = 28,611.45 × 13,174.45
  4. Step 4: Simplify right side
    20,729.59x = 376,940,117.45
  5. Step 5: Solve for x
    x = 376,940,117.45/20,729.59
  6. Step 6: Final answer
    x = 18,183.67

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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.