Home / 21,697.67-29,945.56-12,138.09

Finding the Fourth Proportional to 21,697.67, 29,945.56 and 12,138.09

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Solution

The fourth proportional to 21,697.67, 29,945.56 and 12,138.09 is: 16,752.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,697.67 : 29,945.56 = 12,138.09 : x
  2. Step 2: Convert to fraction form
    21,697.67/29,945.56 = 12,138.09/x
  3. Step 3: Cross multiply
    21,697.67x = 29,945.56 × 12,138.09
  4. Step 4: Simplify right side
    21,697.67x = 363,481,902.38
  5. Step 5: Solve for x
    x = 363,481,902.38/21,697.67
  6. Step 6: Final answer
    x = 16,752.12

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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.