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Finding the Fourth Proportional to 21,273.40, 29,354.74 and 12,319.66

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Solution

The fourth proportional to 21,273.40, 29,354.74 and 12,319.66 is: 16,999.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.40 : 29,354.74 = 12,319.66 : x
  2. Step 2: Convert to fraction form
    21,273.40/29,354.74 = 12,319.66/x
  3. Step 3: Cross multiply
    21,273.40x = 29,354.74 × 12,319.66
  4. Step 4: Simplify right side
    21,273.40x = 361,640,416.19
  5. Step 5: Solve for x
    x = 361,640,416.19/21,273.40
  6. Step 6: Final answer
    x = 16,999.65

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.