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Finding the Fourth Proportional to 19,079.61, 28,619.10 and 5,228.61

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Solution

The fourth proportional to 19,079.61, 28,619.10 and 5,228.61 is: 7,842.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,079.61 : 28,619.10 = 5,228.61 : x
  2. Step 2: Convert to fraction form
    19,079.61/28,619.10 = 5,228.61/x
  3. Step 3: Cross multiply
    19,079.61x = 28,619.10 × 5,228.61
  4. Step 4: Simplify right side
    19,079.61x = 149,638,112.45
  5. Step 5: Solve for x
    x = 149,638,112.45/19,079.61
  6. Step 6: Final answer
    x = 7,842.83

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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.