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Finding the Fourth Proportional to 18,628.26, 27,948.42 and 5,480.70

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Solution

The fourth proportional to 18,628.26, 27,948.42 and 5,480.70 is: 8,222.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.26 : 27,948.42 = 5,480.70 : x
  2. Step 2: Convert to fraction form
    18,628.26/27,948.42 = 5,480.70/x
  3. Step 3: Cross multiply
    18,628.26x = 27,948.42 × 5,480.70
  4. Step 4: Simplify right side
    18,628.26x = 153,176,905.49
  5. Step 5: Solve for x
    x = 153,176,905.49/18,628.26
  6. Step 6: Final answer
    x = 8,222.82

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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.