Home / 21,183.47-29,221.05-13,211.86

Finding the Fourth Proportional to 21,183.47, 29,221.05 and 13,211.86

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Solution

The fourth proportional to 21,183.47, 29,221.05 and 13,211.86 is: 18,224.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.47 : 29,221.05 = 13,211.86 : x
  2. Step 2: Convert to fraction form
    21,183.47/29,221.05 = 13,211.86/x
  3. Step 3: Cross multiply
    21,183.47x = 29,221.05 × 13,211.86
  4. Step 4: Simplify right side
    21,183.47x = 386,064,348.60
  5. Step 5: Solve for x
    x = 386,064,348.60/21,183.47
  6. Step 6: Final answer
    x = 18,224.79

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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.