Home / 20,920.14-28,850.50-14,215.77

Finding the Fourth Proportional to 20,920.14, 28,850.50 and 14,215.77

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Solution

The fourth proportional to 20,920.14, 28,850.50 and 14,215.77 is: 19,604.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.14 : 28,850.50 = 14,215.77 : x
  2. Step 2: Convert to fraction form
    20,920.14/28,850.50 = 14,215.77/x
  3. Step 3: Cross multiply
    20,920.14x = 28,850.50 × 14,215.77
  4. Step 4: Simplify right side
    20,920.14x = 410,132,072.39
  5. Step 5: Solve for x
    x = 410,132,072.39/20,920.14
  6. Step 6: Final answer
    x = 19,604.65

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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.