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Finding the Fourth Proportional to 9,891.84, 13,651.92 and 5,700

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Solution

The fourth proportional to 9,891.84, 13,651.92 and 5,700 is: 7,866.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.84 : 13,651.92 = 5,700 : x
  2. Step 2: Convert to fraction form
    9,891.84/13,651.92 = 5,700/x
  3. Step 3: Cross multiply
    9,891.84x = 13,651.92 × 5,700
  4. Step 4: Simplify right side
    9,891.84x = 77,815,944
  5. Step 5: Solve for x
    x = 77,815,944/9,891.84
  6. Step 6: Final answer
    x = 7,866.68

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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.