Home / 20,505.94-30,749.28-12,187.06

Finding the Fourth Proportional to 20,505.94, 30,749.28 and 12,187.06

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Solution

The fourth proportional to 20,505.94, 30,749.28 and 12,187.06 is: 18,274.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.94 : 30,749.28 = 12,187.06 : x
  2. Step 2: Convert to fraction form
    20,505.94/30,749.28 = 12,187.06/x
  3. Step 3: Cross multiply
    20,505.94x = 30,749.28 × 12,187.06
  4. Step 4: Simplify right side
    20,505.94x = 374,743,320.32
  5. Step 5: Solve for x
    x = 374,743,320.32/20,505.94
  6. Step 6: Final answer
    x = 18,274.87

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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.