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Finding the Fourth Proportional to 19,112.92, 28,658.24 and 7,412.48

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Solution

The fourth proportional to 19,112.92, 28,658.24 and 7,412.48 is: 11,114.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,112.92 : 28,658.24 = 7,412.48 : x
  2. Step 2: Convert to fraction form
    19,112.92/28,658.24 = 7,412.48/x
  3. Step 3: Cross multiply
    19,112.92x = 28,658.24 × 7,412.48
  4. Step 4: Simplify right side
    19,112.92x = 212,428,630.84
  5. Step 5: Solve for x
    x = 212,428,630.84/19,112.92
  6. Step 6: Final answer
    x = 11,114.40

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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.