Home / 21,557.52-29,748.42-11,997.90

Finding the Fourth Proportional to 21,557.52, 29,748.42 and 11,997.90

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Solution

The fourth proportional to 21,557.52, 29,748.42 and 11,997.90 is: 16,556.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,557.52 : 29,748.42 = 11,997.90 : x
  2. Step 2: Convert to fraction form
    21,557.52/29,748.42 = 11,997.90/x
  3. Step 3: Cross multiply
    21,557.52x = 29,748.42 × 11,997.90
  4. Step 4: Simplify right side
    21,557.52x = 356,918,568.32
  5. Step 5: Solve for x
    x = 356,918,568.32/21,557.52
  6. Step 6: Final answer
    x = 16,556.57

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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.