Home / 20,039.08-27,662.38-12,489.12

Finding the Fourth Proportional to 20,039.08, 27,662.38 and 12,489.12

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Solution

The fourth proportional to 20,039.08, 27,662.38 and 12,489.12 is: 17,240.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,039.08 : 27,662.38 = 12,489.12 : x
  2. Step 2: Convert to fraction form
    20,039.08/27,662.38 = 12,489.12/x
  3. Step 3: Cross multiply
    20,039.08x = 27,662.38 × 12,489.12
  4. Step 4: Simplify right side
    20,039.08x = 345,478,783.31
  5. Step 5: Solve for x
    x = 345,478,783.31/20,039.08
  6. Step 6: Final answer
    x = 17,240.25

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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.