Home / 21,780.44-30,054.87-12,218.12

Finding the Fourth Proportional to 21,780.44, 30,054.87 and 12,218.12

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Solution

The fourth proportional to 21,780.44, 30,054.87 and 12,218.12 is: 16,859.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.44 : 30,054.87 = 12,218.12 : x
  2. Step 2: Convert to fraction form
    21,780.44/30,054.87 = 12,218.12/x
  3. Step 3: Cross multiply
    21,780.44x = 30,054.87 × 12,218.12
  4. Step 4: Simplify right side
    21,780.44x = 367,214,008.24
  5. Step 5: Solve for x
    x = 367,214,008.24/21,780.44
  6. Step 6: Final answer
    x = 16,859.81

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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.