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Finding the Fourth Proportional to 7,891.55, 10,889.96 and 4,531.99

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Solution

The fourth proportional to 7,891.55, 10,889.96 and 4,531.99 is: 6,253.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.55 : 10,889.96 = 4,531.99 : x
  2. Step 2: Convert to fraction form
    7,891.55/10,889.96 = 4,531.99/x
  3. Step 3: Cross multiply
    7,891.55x = 10,889.96 × 4,531.99
  4. Step 4: Simplify right side
    7,891.55x = 49,353,189.82
  5. Step 5: Solve for x
    x = 49,353,189.82/7,891.55
  6. Step 6: Final answer
    x = 6,253.93

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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.