Home / 20,930.43-28,891.58-13,859.13

Finding the Fourth Proportional to 20,930.43, 28,891.58 and 13,859.13

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Solution

The fourth proportional to 20,930.43, 28,891.58 and 13,859.13 is: 19,130.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.43 : 28,891.58 = 13,859.13 : x
  2. Step 2: Convert to fraction form
    20,930.43/28,891.58 = 13,859.13/x
  3. Step 3: Cross multiply
    20,930.43x = 28,891.58 × 13,859.13
  4. Step 4: Simplify right side
    20,930.43x = 400,412,093.83
  5. Step 5: Solve for x
    x = 400,412,093.83/20,930.43
  6. Step 6: Final answer
    x = 19,130.62

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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.