Home / 21,186.45-29,237.20-12,234.78

Finding the Fourth Proportional to 21,186.45, 29,237.20 and 12,234.78

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Solution

The fourth proportional to 21,186.45, 29,237.20 and 12,234.78 is: 16,883.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.45 : 29,237.20 = 12,234.78 : x
  2. Step 2: Convert to fraction form
    21,186.45/29,237.20 = 12,234.78/x
  3. Step 3: Cross multiply
    21,186.45x = 29,237.20 × 12,234.78
  4. Step 4: Simplify right side
    21,186.45x = 357,710,709.82
  5. Step 5: Solve for x
    x = 357,710,709.82/21,186.45
  6. Step 6: Final answer
    x = 16,883.94

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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.