Home / 20,538.56-28,343.24-11,107.11

Finding the Fourth Proportional to 20,538.56, 28,343.24 and 11,107.11

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Solution

The fourth proportional to 20,538.56, 28,343.24 and 11,107.11 is: 15,327.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.56 : 28,343.24 = 11,107.11 : x
  2. Step 2: Convert to fraction form
    20,538.56/28,343.24 = 11,107.11/x
  3. Step 3: Cross multiply
    20,538.56x = 28,343.24 × 11,107.11
  4. Step 4: Simplify right side
    20,538.56x = 314,811,428.90
  5. Step 5: Solve for x
    x = 314,811,428.90/20,538.56
  6. Step 6: Final answer
    x = 15,327.83

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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.