Home / 20,930.63-28,891.83-13,859.33

Finding the Fourth Proportional to 20,930.63, 28,891.83 and 13,859.33

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Solution

The fourth proportional to 20,930.63, 28,891.83 and 13,859.33 is: 19,130.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.63 : 28,891.83 = 13,859.33 : x
  2. Step 2: Convert to fraction form
    20,930.63/28,891.83 = 13,859.33/x
  3. Step 3: Cross multiply
    20,930.63x = 28,891.83 × 13,859.33
  4. Step 4: Simplify right side
    20,930.63x = 400,421,261.81
  5. Step 5: Solve for x
    x = 400,421,261.81/20,930.63
  6. Step 6: Final answer
    x = 19,130.88

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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.