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Finding the Fourth Proportional to 12,859.87, 19,273.89 and 7,589.54

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Solution

The fourth proportional to 12,859.87, 19,273.89 and 7,589.54 is: 11,374.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,859.87 : 19,273.89 = 7,589.54 : x
  2. Step 2: Convert to fraction form
    12,859.87/19,273.89 = 7,589.54/x
  3. Step 3: Cross multiply
    12,859.87x = 19,273.89 × 7,589.54
  4. Step 4: Simplify right side
    12,859.87x = 146,279,862.74
  5. Step 5: Solve for x
    x = 146,279,862.74/12,859.87
  6. Step 6: Final answer
    x = 11,374.91

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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.