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Finding the Fourth Proportional to 19,741.63, 29,620.65 and 8,642.61

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Solution

The fourth proportional to 19,741.63, 29,620.65 and 8,642.61 is: 12,967.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,741.63 : 29,620.65 = 8,642.61 : x
  2. Step 2: Convert to fraction form
    19,741.63/29,620.65 = 8,642.61/x
  3. Step 3: Cross multiply
    19,741.63x = 29,620.65 × 8,642.61
  4. Step 4: Simplify right side
    19,741.63x = 255,999,725.90
  5. Step 5: Solve for x
    x = 255,999,725.90/19,741.63
  6. Step 6: Final answer
    x = 12,967.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.