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Finding the Fourth Proportional to 19,105.20, 28,657.80 and 10,648.80

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Solution

The fourth proportional to 19,105.20, 28,657.80 and 10,648.80 is: 15,973.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,105.20 : 28,657.80 = 10,648.80 : x
  2. Step 2: Convert to fraction form
    19,105.20/28,657.80 = 10,648.80/x
  3. Step 3: Cross multiply
    19,105.20x = 28,657.80 × 10,648.80
  4. Step 4: Simplify right side
    19,105.20x = 305,171,180.64
  5. Step 5: Solve for x
    x = 305,171,180.64/19,105.20
  6. Step 6: Final answer
    x = 15,973.20

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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.