Home / 20,768.09-31,145.60-6,724.87

Finding the Fourth Proportional to 20,768.09, 31,145.60 and 6,724.87

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Solution

The fourth proportional to 20,768.09, 31,145.60 and 6,724.87 is: 10,085.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.09 : 31,145.60 = 6,724.87 : x
  2. Step 2: Convert to fraction form
    20,768.09/31,145.60 = 6,724.87/x
  3. Step 3: Cross multiply
    20,768.09x = 31,145.60 × 6,724.87
  4. Step 4: Simplify right side
    20,768.09x = 209,450,077.45
  5. Step 5: Solve for x
    x = 209,450,077.45/20,768.09
  6. Step 6: Final answer
    x = 10,085.19

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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.