Home / 21,580.89-29,782.19-12,149.79

Finding the Fourth Proportional to 21,580.89, 29,782.19 and 12,149.79

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Solution

The fourth proportional to 21,580.89, 29,782.19 and 12,149.79 is: 16,767.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.89 : 29,782.19 = 12,149.79 : x
  2. Step 2: Convert to fraction form
    21,580.89/29,782.19 = 12,149.79/x
  3. Step 3: Cross multiply
    21,580.89x = 29,782.19 × 12,149.79
  4. Step 4: Simplify right side
    21,580.89x = 361,847,293.49
  5. Step 5: Solve for x
    x = 361,847,293.49/21,580.89
  6. Step 6: Final answer
    x = 16,767.02

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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.