Home / 20,745.32-31,149.05-11,870.67

Finding the Fourth Proportional to 20,745.32, 31,149.05 and 11,870.67

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Solution

The fourth proportional to 20,745.32, 31,149.05 and 11,870.67 is: 17,823.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.32 : 31,149.05 = 11,870.67 : x
  2. Step 2: Convert to fraction form
    20,745.32/31,149.05 = 11,870.67/x
  3. Step 3: Cross multiply
    20,745.32x = 31,149.05 × 11,870.67
  4. Step 4: Simplify right side
    20,745.32x = 369,760,034.01
  5. Step 5: Solve for x
    x = 369,760,034.01/20,745.32
  6. Step 6: Final answer
    x = 17,823.78

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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.