Home / 21,390.30-29,517.76-11,829.56

Finding the Fourth Proportional to 21,390.30, 29,517.76 and 11,829.56

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Solution

The fourth proportional to 21,390.30, 29,517.76 and 11,829.56 is: 16,324.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.30 : 29,517.76 = 11,829.56 : x
  2. Step 2: Convert to fraction form
    21,390.30/29,517.76 = 11,829.56/x
  3. Step 3: Cross multiply
    21,390.30x = 29,517.76 × 11,829.56
  4. Step 4: Simplify right side
    21,390.30x = 349,182,112.99
  5. Step 5: Solve for x
    x = 349,182,112.99/21,390.30
  6. Step 6: Final answer
    x = 16,324.32

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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.