Home / 21,404.16-29,538.54-11,972.79

Finding the Fourth Proportional to 21,404.16, 29,538.54 and 11,972.79

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Solution

The fourth proportional to 21,404.16, 29,538.54 and 11,972.79 is: 16,522.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,404.16 : 29,538.54 = 11,972.79 : x
  2. Step 2: Convert to fraction form
    21,404.16/29,538.54 = 11,972.79/x
  3. Step 3: Cross multiply
    21,404.16x = 29,538.54 × 11,972.79
  4. Step 4: Simplify right side
    21,404.16x = 353,658,736.33
  5. Step 5: Solve for x
    x = 353,658,736.33/21,404.16
  6. Step 6: Final answer
    x = 16,522.90

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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.