Home / 12,378.24-17,076.12-8,136.32

Finding the Fourth Proportional to 12,378.24, 17,076.12 and 8,136.32

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Solution

The fourth proportional to 12,378.24, 17,076.12 and 8,136.32 is: 11,224.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.24 : 17,076.12 = 8,136.32 : x
  2. Step 2: Convert to fraction form
    12,378.24/17,076.12 = 8,136.32/x
  3. Step 3: Cross multiply
    12,378.24x = 17,076.12 × 8,136.32
  4. Step 4: Simplify right side
    12,378.24x = 138,936,776.68
  5. Step 5: Solve for x
    x = 138,936,776.68/12,378.24
  6. Step 6: Final answer
    x = 11,224.28

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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.