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Finding the Fourth Proportional to 9,120.69, 13,672.80 and 3,275.93

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Solution

The fourth proportional to 9,120.69, 13,672.80 and 3,275.93 is: 4,910.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.69 : 13,672.80 = 3,275.93 : x
  2. Step 2: Convert to fraction form
    9,120.69/13,672.80 = 3,275.93/x
  3. Step 3: Cross multiply
    9,120.69x = 13,672.80 × 3,275.93
  4. Step 4: Simplify right side
    9,120.69x = 44,791,169.89
  5. Step 5: Solve for x
    x = 44,791,169.89/9,120.69
  6. Step 6: Final answer
    x = 4,910.94

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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.