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Finding the Fourth Proportional to 30,317.62, 45,449.07 and 12,788.50

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Solution

The fourth proportional to 30,317.62, 45,449.07 and 12,788.50 is: 19,171.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,317.62 : 45,449.07 = 12,788.50 : x
  2. Step 2: Convert to fraction form
    30,317.62/45,449.07 = 12,788.50/x
  3. Step 3: Cross multiply
    30,317.62x = 45,449.07 × 12,788.50
  4. Step 4: Simplify right side
    30,317.62x = 581,225,431.70
  5. Step 5: Solve for x
    x = 581,225,431.70/30,317.62
  6. Step 6: Final answer
    x = 19,171.21

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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.