Home / 20,142.56-30,188.28-11,382.38

Finding the Fourth Proportional to 20,142.56, 30,188.28 and 11,382.38

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Solution

The fourth proportional to 20,142.56, 30,188.28 and 11,382.38 is: 17,059.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.56 : 30,188.28 = 11,382.38 : x
  2. Step 2: Convert to fraction form
    20,142.56/30,188.28 = 11,382.38/x
  3. Step 3: Cross multiply
    20,142.56x = 30,188.28 × 11,382.38
  4. Step 4: Simplify right side
    20,142.56x = 343,614,474.51
  5. Step 5: Solve for x
    x = 343,614,474.51/20,142.56
  6. Step 6: Final answer
    x = 17,059.13

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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.