Home / 31,918.80-47,897.34-12,198.90

Finding the Fourth Proportional to 31,918.80, 47,897.34 and 12,198.90

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Solution

The fourth proportional to 31,918.80, 47,897.34 and 12,198.90 is: 18,305.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,918.80 : 47,897.34 = 12,198.90 : x
  2. Step 2: Convert to fraction form
    31,918.80/47,897.34 = 12,198.90/x
  3. Step 3: Cross multiply
    31,918.80x = 47,897.34 × 12,198.90
  4. Step 4: Simplify right side
    31,918.80x = 584,294,860.93
  5. Step 5: Solve for x
    x = 584,294,860.93/31,918.80
  6. Step 6: Final answer
    x = 18,305.67

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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.