Home / 74,321.45-111,468.15-21,013

Finding the Fourth Proportional to 74,321.45, 111,468.15 and 21,013

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Solution

The fourth proportional to 74,321.45, 111,468.15 and 21,013 is: 31,515.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,321.45 : 111,468.15 = 21,013 : x
  2. Step 2: Convert to fraction form
    74,321.45/111,468.15 = 21,013/x
  3. Step 3: Cross multiply
    74,321.45x = 111,468.15 × 21,013
  4. Step 4: Simplify right side
    74,321.45x = 2,342,280,235.95
  5. Step 5: Solve for x
    x = 2,342,280,235.95/74,321.45
  6. Step 6: Final answer
    x = 31,515.53

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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.