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Finding the Fourth Proportional to 18,681.88, 25,745.56 and 13,367.48

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Solution

The fourth proportional to 18,681.88, 25,745.56 and 13,367.48 is: 18,421.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.88 : 25,745.56 = 13,367.48 : x
  2. Step 2: Convert to fraction form
    18,681.88/25,745.56 = 13,367.48/x
  3. Step 3: Cross multiply
    18,681.88x = 25,745.56 × 13,367.48
  4. Step 4: Simplify right side
    18,681.88x = 344,153,258.39
  5. Step 5: Solve for x
    x = 344,153,258.39/18,681.88
  6. Step 6: Final answer
    x = 18,421.77

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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.