Home / 20,778.69-31,168.04-5,196.32

Finding the Fourth Proportional to 20,778.69, 31,168.04 and 5,196.32

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Solution

The fourth proportional to 20,778.69, 31,168.04 and 5,196.32 is: 7,794.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.69 : 31,168.04 = 5,196.32 : x
  2. Step 2: Convert to fraction form
    20,778.69/31,168.04 = 5,196.32/x
  3. Step 3: Cross multiply
    20,778.69x = 31,168.04 × 5,196.32
  4. Step 4: Simplify right side
    20,778.69x = 161,958,927.79
  5. Step 5: Solve for x
    x = 161,958,927.79/20,778.69
  6. Step 6: Final answer
    x = 7,794.47

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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.