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Finding the Fourth Proportional to 30,512.70, 45,788.49 and 12,982.50

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Solution

The fourth proportional to 30,512.70, 45,788.49 and 12,982.50 is: 19,482.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,512.70 : 45,788.49 = 12,982.50 : x
  2. Step 2: Convert to fraction form
    30,512.70/45,788.49 = 12,982.50/x
  3. Step 3: Cross multiply
    30,512.70x = 45,788.49 × 12,982.50
  4. Step 4: Simplify right side
    30,512.70x = 594,449,071.43
  5. Step 5: Solve for x
    x = 594,449,071.43/30,512.70
  6. Step 6: Final answer
    x = 19,482.02

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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.