Home / 12,138.48-16,756.27-8,161.90

Finding the Fourth Proportional to 12,138.48, 16,756.27 and 8,161.90

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Solution

The fourth proportional to 12,138.48, 16,756.27 and 8,161.90 is: 11,266.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.48 : 16,756.27 = 8,161.90 : x
  2. Step 2: Convert to fraction form
    12,138.48/16,756.27 = 8,161.90/x
  3. Step 3: Cross multiply
    12,138.48x = 16,756.27 × 8,161.90
  4. Step 4: Simplify right side
    12,138.48x = 136,763,000.11
  5. Step 5: Solve for x
    x = 136,763,000.11/12,138.48
  6. Step 6: Final answer
    x = 11,266.90

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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.