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Finding the Fourth Proportional to 21,859.68, 30,166.44 and 11,923.68

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Solution

The fourth proportional to 21,859.68, 30,166.44 and 11,923.68 is: 16,454.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.68 : 30,166.44 = 11,923.68 : x
  2. Step 2: Convert to fraction form
    21,859.68/30,166.44 = 11,923.68/x
  3. Step 3: Cross multiply
    21,859.68x = 30,166.44 × 11,923.68
  4. Step 4: Simplify right side
    21,859.68x = 359,694,977.30
  5. Step 5: Solve for x
    x = 359,694,977.30/21,859.68
  6. Step 6: Final answer
    x = 16,454.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.