Home / 21,623.88-29,840.49-12,192.78

Finding the Fourth Proportional to 21,623.88, 29,840.49 and 12,192.78

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Solution

The fourth proportional to 21,623.88, 29,840.49 and 12,192.78 is: 16,825.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,623.88 : 29,840.49 = 12,192.78 : x
  2. Step 2: Convert to fraction form
    21,623.88/29,840.49 = 12,192.78/x
  3. Step 3: Cross multiply
    21,623.88x = 29,840.49 × 12,192.78
  4. Step 4: Simplify right side
    21,623.88x = 363,838,529.66
  5. Step 5: Solve for x
    x = 363,838,529.66/21,623.88
  6. Step 6: Final answer
    x = 16,825.77

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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.