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Finding the Fourth Proportional to 13,992.25, 20,988.39 and 4,758.25

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Solution

The fourth proportional to 13,992.25, 20,988.39 and 4,758.25 is: 7,137.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.25 : 20,988.39 = 4,758.25 : x
  2. Step 2: Convert to fraction form
    13,992.25/20,988.39 = 4,758.25/x
  3. Step 3: Cross multiply
    13,992.25x = 20,988.39 × 4,758.25
  4. Step 4: Simplify right side
    13,992.25x = 99,868,006.72
  5. Step 5: Solve for x
    x = 99,868,006.72/13,992.25
  6. Step 6: Final answer
    x = 7,137.38

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1.5x scale

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.