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Finding the Fourth Proportional to 15,137.11, 20,885.93 and 9,169.03

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Solution

The fourth proportional to 15,137.11, 20,885.93 and 9,169.03 is: 12,651.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,137.11 : 20,885.93 = 9,169.03 : x
  2. Step 2: Convert to fraction form
    15,137.11/20,885.93 = 9,169.03/x
  3. Step 3: Cross multiply
    15,137.11x = 20,885.93 × 9,169.03
  4. Step 4: Simplify right side
    15,137.11x = 191,503,614.32
  5. Step 5: Solve for x
    x = 191,503,614.32/15,137.11
  6. Step 6: Final answer
    x = 12,651.27

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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.