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Finding the Fourth Proportional to 19,218.30, 28,836.35 and 7,368.11

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Solution

The fourth proportional to 19,218.30, 28,836.35 and 7,368.11 is: 11,055.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,218.30 : 28,836.35 = 7,368.11 : x
  2. Step 2: Convert to fraction form
    19,218.30/28,836.35 = 7,368.11/x
  3. Step 3: Cross multiply
    19,218.30x = 28,836.35 × 7,368.11
  4. Step 4: Simplify right side
    19,218.30x = 212,469,251.72
  5. Step 5: Solve for x
    x = 212,469,251.72/19,218.30
  6. Step 6: Final answer
    x = 11,055.57

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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.