Home / 21,919.77-30,245.67-12,486.51

Finding the Fourth Proportional to 21,919.77, 30,245.67 and 12,486.51

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Solution

The fourth proportional to 21,919.77, 30,245.67 and 12,486.51 is: 17,229.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919.77 : 30,245.67 = 12,486.51 : x
  2. Step 2: Convert to fraction form
    21,919.77/30,245.67 = 12,486.51/x
  3. Step 3: Cross multiply
    21,919.77x = 30,245.67 × 12,486.51
  4. Step 4: Simplify right side
    21,919.77x = 377,662,860.91
  5. Step 5: Solve for x
    x = 377,662,860.91/21,919.77
  6. Step 6: Final answer
    x = 17,229.33

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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.