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Finding the Fourth Proportional to 21,186, 29,237.01 and 12,234.28

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Solution

The fourth proportional to 21,186, 29,237.01 and 12,234.28 is: 16,883.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186 : 29,237.01 = 12,234.28 : x
  2. Step 2: Convert to fraction form
    21,186/29,237.01 = 12,234.28/x
  3. Step 3: Cross multiply
    21,186x = 29,237.01 × 12,234.28
  4. Step 4: Simplify right side
    21,186x = 357,693,766.70
  5. Step 5: Solve for x
    x = 357,693,766.70/21,186
  6. Step 6: Final answer
    x = 16,883.50

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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.