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Finding the Fourth Proportional to 19,169.70, 28,737.45 and 7,480.20

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Solution

The fourth proportional to 19,169.70, 28,737.45 and 7,480.20 is: 11,213.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,169.70 : 28,737.45 = 7,480.20 : x
  2. Step 2: Convert to fraction form
    19,169.70/28,737.45 = 7,480.20/x
  3. Step 3: Cross multiply
    19,169.70x = 28,737.45 × 7,480.20
  4. Step 4: Simplify right side
    19,169.70x = 214,961,873.49
  5. Step 5: Solve for x
    x = 214,961,873.49/19,169.70
  6. Step 6: Final answer
    x = 11,213.63

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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.