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Finding the Fourth Proportional to 15,682.86, 21,627.90 and 10,654.61

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Solution

The fourth proportional to 15,682.86, 21,627.90 and 10,654.61 is: 14,693.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,682.86 : 21,627.90 = 10,654.61 : x
  2. Step 2: Convert to fraction form
    15,682.86/21,627.90 = 10,654.61/x
  3. Step 3: Cross multiply
    15,682.86x = 21,627.90 × 10,654.61
  4. Step 4: Simplify right side
    15,682.86x = 230,436,731.48
  5. Step 5: Solve for x
    x = 230,436,731.48/15,682.86
  6. Step 6: Final answer
    x = 14,693.54

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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.