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Finding the Fourth Proportional to 19,200.47, 28,780.92 and 7,351.44

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Solution

The fourth proportional to 19,200.47, 28,780.92 and 7,351.44 is: 11,019.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,200.47 : 28,780.92 = 7,351.44 : x
  2. Step 2: Convert to fraction form
    19,200.47/28,780.92 = 7,351.44/x
  3. Step 3: Cross multiply
    19,200.47x = 28,780.92 × 7,351.44
  4. Step 4: Simplify right side
    19,200.47x = 211,581,206.52
  5. Step 5: Solve for x
    x = 211,581,206.52/19,200.47
  6. Step 6: Final answer
    x = 11,019.59

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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.