Home / 19,854.55-27,400.68-13,128.49

Finding the Fourth Proportional to 19,854.55, 27,400.68 and 13,128.49

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Solution

The fourth proportional to 19,854.55, 27,400.68 and 13,128.49 is: 18,118.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,854.55 : 27,400.68 = 13,128.49 : x
  2. Step 2: Convert to fraction form
    19,854.55/27,400.68 = 13,128.49/x
  3. Step 3: Cross multiply
    19,854.55x = 27,400.68 × 13,128.49
  4. Step 4: Simplify right side
    19,854.55x = 359,729,553.37
  5. Step 5: Solve for x
    x = 359,729,553.37/19,854.55
  6. Step 6: Final answer
    x = 18,118.24

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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.