Home / 21,858.12-30,166.97-12,424.86

Finding the Fourth Proportional to 21,858.12, 30,166.97 and 12,424.86

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Solution

The fourth proportional to 21,858.12, 30,166.97 and 12,424.86 is: 17,147.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.12 : 30,166.97 = 12,424.86 : x
  2. Step 2: Convert to fraction form
    21,858.12/30,166.97 = 12,424.86/x
  3. Step 3: Cross multiply
    21,858.12x = 30,166.97 × 12,424.86
  4. Step 4: Simplify right side
    21,858.12x = 374,820,316.75
  5. Step 5: Solve for x
    x = 374,820,316.75/21,858.12
  6. Step 6: Final answer
    x = 17,147.88

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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.