Home / 20,538.70-28,343.39-11,107.30

Finding the Fourth Proportional to 20,538.70, 28,343.39 and 11,107.30

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Solution

The fourth proportional to 20,538.70, 28,343.39 and 11,107.30 is: 15,328.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.70 : 28,343.39 = 11,107.30 : x
  2. Step 2: Convert to fraction form
    20,538.70/28,343.39 = 11,107.30/x
  3. Step 3: Cross multiply
    20,538.70x = 28,343.39 × 11,107.30
  4. Step 4: Simplify right side
    20,538.70x = 314,818,535.75
  5. Step 5: Solve for x
    x = 314,818,535.75/20,538.70
  6. Step 6: Final answer
    x = 15,328.07

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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.