Home / 21,855.35-30,160.25-12,423.92

Finding the Fourth Proportional to 21,855.35, 30,160.25 and 12,423.92

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Solution

The fourth proportional to 21,855.35, 30,160.25 and 12,423.92 is: 17,144.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.35 : 30,160.25 = 12,423.92 : x
  2. Step 2: Convert to fraction form
    21,855.35/30,160.25 = 12,423.92/x
  3. Step 3: Cross multiply
    21,855.35x = 30,160.25 × 12,423.92
  4. Step 4: Simplify right side
    21,855.35x = 374,708,366.85
  5. Step 5: Solve for x
    x = 374,708,366.85/21,855.35
  6. Step 6: Final answer
    x = 17,144.92

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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.