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Finding the Fourth Proportional to 19,303.89, 28,956.12 and 7,617

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Solution

The fourth proportional to 19,303.89, 28,956.12 and 7,617 is: 11,425.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,303.89 : 28,956.12 = 7,617 : x
  2. Step 2: Convert to fraction form
    19,303.89/28,956.12 = 7,617/x
  3. Step 3: Cross multiply
    19,303.89x = 28,956.12 × 7,617
  4. Step 4: Simplify right side
    19,303.89x = 220,558,766.04
  5. Step 5: Solve for x
    x = 220,558,766.04/19,303.89
  6. Step 6: Final answer
    x = 11,425.61

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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.