Home / 21,771.45-30,046.95-12,339

Finding the Fourth Proportional to 21,771.45, 30,046.95 and 12,339

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Solution

The fourth proportional to 21,771.45, 30,046.95 and 12,339 is: 17,029.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,771.45 : 30,046.95 = 12,339 : x
  2. Step 2: Convert to fraction form
    21,771.45/30,046.95 = 12,339/x
  3. Step 3: Cross multiply
    21,771.45x = 30,046.95 × 12,339
  4. Step 4: Simplify right side
    21,771.45x = 370,749,316.05
  5. Step 5: Solve for x
    x = 370,749,316.05/21,771.45
  6. Step 6: Final answer
    x = 17,029.15

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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.