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Finding the Fourth Proportional to 7,892.56, 10,891.97 and 4,356

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Solution

The fourth proportional to 7,892.56, 10,891.97 and 4,356 is: 6,011.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,892.56 : 10,891.97 = 4,356 : x
  2. Step 2: Convert to fraction form
    7,892.56/10,891.97 = 4,356/x
  3. Step 3: Cross multiply
    7,892.56x = 10,891.97 × 4,356
  4. Step 4: Simplify right side
    7,892.56x = 47,445,421.32
  5. Step 5: Solve for x
    x = 47,445,421.32/7,892.56
  6. Step 6: Final answer
    x = 6,011.41

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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.