Home / 20,391.14-28,137.58-11,776.79

Finding the Fourth Proportional to 20,391.14, 28,137.58 and 11,776.79

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Solution

The fourth proportional to 20,391.14, 28,137.58 and 11,776.79 is: 16,250.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.14 : 28,137.58 = 11,776.79 : x
  2. Step 2: Convert to fraction form
    20,391.14/28,137.58 = 11,776.79/x
  3. Step 3: Cross multiply
    20,391.14x = 28,137.58 × 11,776.79
  4. Step 4: Simplify right side
    20,391.14x = 331,370,411.67
  5. Step 5: Solve for x
    x = 331,370,411.67/20,391.14
  6. Step 6: Final answer
    x = 16,250.70

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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.