Home / 12,485.99-17,231.18-7,180.80

Finding the Fourth Proportional to 12,485.99, 17,231.18 and 7,180.80

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Solution

The fourth proportional to 12,485.99, 17,231.18 and 7,180.80 is: 9,909.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.99 : 17,231.18 = 7,180.80 : x
  2. Step 2: Convert to fraction form
    12,485.99/17,231.18 = 7,180.80/x
  3. Step 3: Cross multiply
    12,485.99x = 17,231.18 × 7,180.80
  4. Step 4: Simplify right side
    12,485.99x = 123,733,621.44
  5. Step 5: Solve for x
    x = 123,733,621.44/12,485.99
  6. Step 6: Final answer
    x = 9,909.80

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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.