Home / 20,930.67-28,891.91-13,859.37

Finding the Fourth Proportional to 20,930.67, 28,891.91 and 13,859.37

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Solution

The fourth proportional to 20,930.67, 28,891.91 and 13,859.37 is: 19,130.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.67 : 28,891.91 = 13,859.37 : x
  2. Step 2: Convert to fraction form
    20,930.67/28,891.91 = 13,859.37/x
  3. Step 3: Cross multiply
    20,930.67x = 28,891.91 × 13,859.37
  4. Step 4: Simplify right side
    20,930.67x = 400,423,705.35
  5. Step 5: Solve for x
    x = 400,423,705.35/20,930.67
  6. Step 6: Final answer
    x = 19,130.95

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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.