Home / 21,910.96-30,235.44-12,957.76

Finding the Fourth Proportional to 21,910.96, 30,235.44 and 12,957.76

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Solution

The fourth proportional to 21,910.96, 30,235.44 and 12,957.76 is: 17,880.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,910.96 : 30,235.44 = 12,957.76 : x
  2. Step 2: Convert to fraction form
    21,910.96/30,235.44 = 12,957.76/x
  3. Step 3: Cross multiply
    21,910.96x = 30,235.44 × 12,957.76
  4. Step 4: Simplify right side
    21,910.96x = 391,783,575.01
  5. Step 5: Solve for x
    x = 391,783,575.01/21,910.96
  6. Step 6: Final answer
    x = 17,880.71

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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.