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Finding the Fourth Proportional to 19,101.12, 28,620.06 and 7,407.96

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Solution

The fourth proportional to 19,101.12, 28,620.06 and 7,407.96 is: 11,099.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,101.12 : 28,620.06 = 7,407.96 : x
  2. Step 2: Convert to fraction form
    19,101.12/28,620.06 = 7,407.96/x
  3. Step 3: Cross multiply
    19,101.12x = 28,620.06 × 7,407.96
  4. Step 4: Simplify right side
    19,101.12x = 212,016,259.68
  5. Step 5: Solve for x
    x = 212,016,259.68/19,101.12
  6. Step 6: Final answer
    x = 11,099.68

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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.