Home / 18,667.30-28,005.05-13,721.95

Finding the Fourth Proportional to 18,667.30, 28,005.05 and 13,721.95

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Solution

The fourth proportional to 18,667.30, 28,005.05 and 13,721.95 is: 20,585.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667.30 : 28,005.05 = 13,721.95 : x
  2. Step 2: Convert to fraction form
    18,667.30/28,005.05 = 13,721.95/x
  3. Step 3: Cross multiply
    18,667.30x = 28,005.05 × 13,721.95
  4. Step 4: Simplify right side
    18,667.30x = 384,283,757.23
  5. Step 5: Solve for x
    x = 384,283,757.23/18,667.30
  6. Step 6: Final answer
    x = 20,585.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.