Home / 30,438.98-45,658.49-19,917.86

Finding the Fourth Proportional to 30,438.98, 45,658.49 and 19,917.86

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Solution

The fourth proportional to 30,438.98, 45,658.49 and 19,917.86 is: 29,876.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,438.98 : 45,658.49 = 19,917.86 : x
  2. Step 2: Convert to fraction form
    30,438.98/45,658.49 = 19,917.86/x
  3. Step 3: Cross multiply
    30,438.98x = 45,658.49 × 19,917.86
  4. Step 4: Simplify right side
    30,438.98x = 909,419,297.49
  5. Step 5: Solve for x
    x = 909,419,297.49/30,438.98
  6. Step 6: Final answer
    x = 29,876.80

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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.