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Finding the Fourth Proportional to 19,699.86, 27,195.84 and 15,213.54

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Solution

The fourth proportional to 19,699.86, 27,195.84 and 15,213.54 is: 21,002.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,699.86 : 27,195.84 = 15,213.54 : x
  2. Step 2: Convert to fraction form
    19,699.86/27,195.84 = 15,213.54/x
  3. Step 3: Cross multiply
    19,699.86x = 27,195.84 × 15,213.54
  4. Step 4: Simplify right side
    19,699.86x = 413,744,999.67
  5. Step 5: Solve for x
    x = 413,744,999.67/19,699.86
  6. Step 6: Final answer
    x = 21,002.43

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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.