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Finding the Fourth Proportional to 11,218.61, 16,828.18 and 5,368.79

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Solution

The fourth proportional to 11,218.61, 16,828.18 and 5,368.79 is: 8,053.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,218.61 : 16,828.18 = 5,368.79 : x
  2. Step 2: Convert to fraction form
    11,218.61/16,828.18 = 5,368.79/x
  3. Step 3: Cross multiply
    11,218.61x = 16,828.18 × 5,368.79
  4. Step 4: Simplify right side
    11,218.61x = 90,346,866.94
  5. Step 5: Solve for x
    x = 90,346,866.94/11,218.61
  6. Step 6: Final answer
    x = 8,053.31

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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.