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Finding the Fourth Proportional to 19,305.48, 28,964.67 and 7,612.32

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Solution

The fourth proportional to 19,305.48, 28,964.67 and 7,612.32 is: 11,421.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,305.48 : 28,964.67 = 7,612.32 : x
  2. Step 2: Convert to fraction form
    19,305.48/28,964.67 = 7,612.32/x
  3. Step 3: Cross multiply
    19,305.48x = 28,964.67 × 7,612.32
  4. Step 4: Simplify right side
    19,305.48x = 220,488,336.73
  5. Step 5: Solve for x
    x = 220,488,336.73/19,305.48
  6. Step 6: Final answer
    x = 11,421.02

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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.