Home / 21,140.49-29,173.82-12,187.95

Finding the Fourth Proportional to 21,140.49, 29,173.82 and 12,187.95

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Solution

The fourth proportional to 21,140.49, 29,173.82 and 12,187.95 is: 16,819.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.49 : 29,173.82 = 12,187.95 : x
  2. Step 2: Convert to fraction form
    21,140.49/29,173.82 = 12,187.95/x
  3. Step 3: Cross multiply
    21,140.49x = 29,173.82 × 12,187.95
  4. Step 4: Simplify right side
    21,140.49x = 355,569,059.47
  5. Step 5: Solve for x
    x = 355,569,059.47/21,140.49
  6. Step 6: Final answer
    x = 16,819.34

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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.