Home / 20,768.28-31,152.39-5,185.92

Finding the Fourth Proportional to 20,768.28, 31,152.39 and 5,185.92

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Solution

The fourth proportional to 20,768.28, 31,152.39 and 5,185.92 is: 7,778.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.28 : 31,152.39 = 5,185.92 : x
  2. Step 2: Convert to fraction form
    20,768.28/31,152.39 = 5,185.92/x
  3. Step 3: Cross multiply
    20,768.28x = 31,152.39 × 5,185.92
  4. Step 4: Simplify right side
    20,768.28x = 161,553,802.35
  5. Step 5: Solve for x
    x = 161,553,802.35/20,768.28
  6. Step 6: Final answer
    x = 7,778.87

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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.