Home / 21,182.78-29,231.25-11,622.45

Finding the Fourth Proportional to 21,182.78, 29,231.25 and 11,622.45

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Solution

The fourth proportional to 21,182.78, 29,231.25 and 11,622.45 is: 16,038.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,182.78 : 29,231.25 = 11,622.45 : x
  2. Step 2: Convert to fraction form
    21,182.78/29,231.25 = 11,622.45/x
  3. Step 3: Cross multiply
    21,182.78x = 29,231.25 × 11,622.45
  4. Step 4: Simplify right side
    21,182.78x = 339,738,741.56
  5. Step 5: Solve for x
    x = 339,738,741.56/21,182.78
  6. Step 6: Final answer
    x = 16,038.44

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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.