Home / 21,693.40-29,940.03-12,745.78

Finding the Fourth Proportional to 21,693.40, 29,940.03 and 12,745.78

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Solution

The fourth proportional to 21,693.40, 29,940.03 and 12,745.78 is: 17,591.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,693.40 : 29,940.03 = 12,745.78 : x
  2. Step 2: Convert to fraction form
    21,693.40/29,940.03 = 12,745.78/x
  3. Step 3: Cross multiply
    21,693.40x = 29,940.03 × 12,745.78
  4. Step 4: Simplify right side
    21,693.40x = 381,609,035.57
  5. Step 5: Solve for x
    x = 381,609,035.57/21,693.40
  6. Step 6: Final answer
    x = 17,591.02

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1.5x scale

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.