Home / 12,175.20-18,262.80-6,991.20

Finding the Fourth Proportional to 12,175.20, 18,262.80 and 6,991.20

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Solution

The fourth proportional to 12,175.20, 18,262.80 and 6,991.20 is: 10,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,175.20 : 18,262.80 = 6,991.20 : x
  2. Step 2: Convert to fraction form
    12,175.20/18,262.80 = 6,991.20/x
  3. Step 3: Cross multiply
    12,175.20x = 18,262.80 × 6,991.20
  4. Step 4: Simplify right side
    12,175.20x = 127,678,887.36
  5. Step 5: Solve for x
    x = 127,678,887.36/12,175.20
  6. Step 6: Final answer
    x = 10,486.80

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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.