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Finding the Fourth Proportional to 17,124.60, 25,686.54 and 7,890.60

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Solution

The fourth proportional to 17,124.60, 25,686.54 and 7,890.60 is: 11,835.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,124.60 : 25,686.54 = 7,890.60 : x
  2. Step 2: Convert to fraction form
    17,124.60/25,686.54 = 7,890.60/x
  3. Step 3: Cross multiply
    17,124.60x = 25,686.54 × 7,890.60
  4. Step 4: Simplify right side
    17,124.60x = 202,682,212.52
  5. Step 5: Solve for x
    x = 202,682,212.52/17,124.60
  6. Step 6: Final answer
    x = 11,835.73

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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.