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Finding the Fourth Proportional to 19,002.52, 28,488.40 and 7,917.54

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Solution

The fourth proportional to 19,002.52, 28,488.40 and 7,917.54 is: 11,869.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,002.52 : 28,488.40 = 7,917.54 : x
  2. Step 2: Convert to fraction form
    19,002.52/28,488.40 = 7,917.54/x
  3. Step 3: Cross multiply
    19,002.52x = 28,488.40 × 7,917.54
  4. Step 4: Simplify right side
    19,002.52x = 225,557,864.51
  5. Step 5: Solve for x
    x = 225,557,864.51/19,002.52
  6. Step 6: Final answer
    x = 11,869.89

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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.