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Finding the Fourth Proportional to 19,188.90, 28,778.49 and 7,502.22

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Solution

The fourth proportional to 19,188.90, 28,778.49 and 7,502.22 is: 11,251.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,188.90 : 28,778.49 = 7,502.22 : x
  2. Step 2: Convert to fraction form
    19,188.90/28,778.49 = 7,502.22/x
  3. Step 3: Cross multiply
    19,188.90x = 28,778.49 × 7,502.22
  4. Step 4: Simplify right side
    19,188.90x = 215,902,563.25
  5. Step 5: Solve for x
    x = 215,902,563.25/19,188.90
  6. Step 6: Final answer
    x = 11,251.43

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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.