Home / 21,910.94-30,237.04-12,479.53

Finding the Fourth Proportional to 21,910.94, 30,237.04 and 12,479.53

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Solution

The fourth proportional to 21,910.94, 30,237.04 and 12,479.53 is: 17,221.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,910.94 : 30,237.04 = 12,479.53 : x
  2. Step 2: Convert to fraction form
    21,910.94/30,237.04 = 12,479.53/x
  3. Step 3: Cross multiply
    21,910.94x = 30,237.04 × 12,479.53
  4. Step 4: Simplify right side
    21,910.94x = 377,344,047.79
  5. Step 5: Solve for x
    x = 377,344,047.79/21,910.94
  6. Step 6: Final answer
    x = 17,221.72

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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.