Home / 13,405.38-20,109.18-5,085.38

Finding the Fourth Proportional to 13,405.38, 20,109.18 and 5,085.38

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Solution

The fourth proportional to 13,405.38, 20,109.18 and 5,085.38 is: 7,628.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.38 : 20,109.18 = 5,085.38 : x
  2. Step 2: Convert to fraction form
    13,405.38/20,109.18 = 5,085.38/x
  3. Step 3: Cross multiply
    13,405.38x = 20,109.18 × 5,085.38
  4. Step 4: Simplify right side
    13,405.38x = 102,262,821.79
  5. Step 5: Solve for x
    x = 102,262,821.79/13,405.38
  6. Step 6: Final answer
    x = 7,628.49

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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.