Home / 22,380.45-30,885.78-12,309.64

Finding the Fourth Proportional to 22,380.45, 30,885.78 and 12,309.64

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Solution

The fourth proportional to 22,380.45, 30,885.78 and 12,309.64 is: 16,987.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,380.45 : 30,885.78 = 12,309.64 : x
  2. Step 2: Convert to fraction form
    22,380.45/30,885.78 = 12,309.64/x
  3. Step 3: Cross multiply
    22,380.45x = 30,885.78 × 12,309.64
  4. Step 4: Simplify right side
    22,380.45x = 380,192,832.92
  5. Step 5: Solve for x
    x = 380,192,832.92/22,380.45
  6. Step 6: Final answer
    x = 16,987.72

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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.