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Finding the Fourth Proportional to 10,659.56, 15,992.67 and 3,639.74

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Solution

The fourth proportional to 10,659.56, 15,992.67 and 3,639.74 is: 5,460.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,659.56 : 15,992.67 = 3,639.74 : x
  2. Step 2: Convert to fraction form
    10,659.56/15,992.67 = 3,639.74/x
  3. Step 3: Cross multiply
    10,659.56x = 15,992.67 × 3,639.74
  4. Step 4: Simplify right side
    10,659.56x = 58,209,160.71
  5. Step 5: Solve for x
    x = 58,209,160.71/10,659.56
  6. Step 6: Final answer
    x = 5,460.75

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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.