Home / 22,261.21-30,720.45-12,189.65

Finding the Fourth Proportional to 22,261.21, 30,720.45 and 12,189.65

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Solution

The fourth proportional to 22,261.21, 30,720.45 and 12,189.65 is: 16,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,261.21 : 30,720.45 = 12,189.65 : x
  2. Step 2: Convert to fraction form
    22,261.21/30,720.45 = 12,189.65/x
  3. Step 3: Cross multiply
    22,261.21x = 30,720.45 × 12,189.65
  4. Step 4: Simplify right side
    22,261.21x = 374,471,379.74
  5. Step 5: Solve for x
    x = 374,471,379.74/22,261.21
  6. Step 6: Final answer
    x = 16,821.70

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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.