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Finding the Fourth Proportional to 30,208, 45,314.56 and 8,320

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Solution

The fourth proportional to 30,208, 45,314.56 and 8,320 is: 12,480.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,208 : 45,314.56 = 8,320 : x
  2. Step 2: Convert to fraction form
    30,208/45,314.56 = 8,320/x
  3. Step 3: Cross multiply
    30,208x = 45,314.56 × 8,320
  4. Step 4: Simplify right side
    30,208x = 377,017,139.20
  5. Step 5: Solve for x
    x = 377,017,139.20/30,208
  6. Step 6: Final answer
    x = 12,480.71

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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.