Home / 21,660.24-29,890.38-12,229.68

Finding the Fourth Proportional to 21,660.24, 29,890.38 and 12,229.68

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Solution

The fourth proportional to 21,660.24, 29,890.38 and 12,229.68 is: 16,876.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.24 : 29,890.38 = 12,229.68 : x
  2. Step 2: Convert to fraction form
    21,660.24/29,890.38 = 12,229.68/x
  3. Step 3: Cross multiply
    21,660.24x = 29,890.38 × 12,229.68
  4. Step 4: Simplify right side
    21,660.24x = 365,549,782.48
  5. Step 5: Solve for x
    x = 365,549,782.48/21,660.24
  6. Step 6: Final answer
    x = 16,876.53

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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.