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Finding the Fourth Proportional to 28,992.40, 43,488.60 and 8,216.08

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Solution

The fourth proportional to 28,992.40, 43,488.60 and 8,216.08 is: 12,324.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,992.40 : 43,488.60 = 8,216.08 : x
  2. Step 2: Convert to fraction form
    28,992.40/43,488.60 = 8,216.08/x
  3. Step 3: Cross multiply
    28,992.40x = 43,488.60 × 8,216.08
  4. Step 4: Simplify right side
    28,992.40x = 357,305,816.69
  5. Step 5: Solve for x
    x = 357,305,816.69/28,992.40
  6. Step 6: Final answer
    x = 12,324.12

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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.