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Finding the Fourth Proportional to 30,138.54, 45,209.98 and 7,951.66

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Solution

The fourth proportional to 30,138.54, 45,209.98 and 7,951.66 is: 11,928.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,138.54 : 45,209.98 = 7,951.66 : x
  2. Step 2: Convert to fraction form
    30,138.54/45,209.98 = 7,951.66/x
  3. Step 3: Cross multiply
    30,138.54x = 45,209.98 × 7,951.66
  4. Step 4: Simplify right side
    30,138.54x = 359,494,389.57
  5. Step 5: Solve for x
    x = 359,494,389.57/30,138.54
  6. Step 6: Final answer
    x = 11,928.06

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1.5x scale

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.