Home / 21,917.57-30,238.85-12,479.45

Finding the Fourth Proportional to 21,917.57, 30,238.85 and 12,479.45

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Solution

The fourth proportional to 21,917.57, 30,238.85 and 12,479.45 is: 17,217.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.57 : 30,238.85 = 12,479.45 : x
  2. Step 2: Convert to fraction form
    21,917.57/30,238.85 = 12,479.45/x
  3. Step 3: Cross multiply
    21,917.57x = 30,238.85 × 12,479.45
  4. Step 4: Simplify right side
    21,917.57x = 377,364,003.04
  5. Step 5: Solve for x
    x = 377,364,003.04/21,917.57
  6. Step 6: Final answer
    x = 17,217.42

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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.