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Finding the Fourth Proportional to 19,149.20, 28,712.04 and 7,448.80

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Solution

The fourth proportional to 19,149.20, 28,712.04 and 7,448.80 is: 11,168.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,149.20 : 28,712.04 = 7,448.80 : x
  2. Step 2: Convert to fraction form
    19,149.20/28,712.04 = 7,448.80/x
  3. Step 3: Cross multiply
    19,149.20x = 28,712.04 × 7,448.80
  4. Step 4: Simplify right side
    19,149.20x = 213,870,243.55
  5. Step 5: Solve for x
    x = 213,870,243.55/19,149.20
  6. Step 6: Final answer
    x = 11,168.63

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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.