Home / 7,920.05-11,881.87-4,220.33

Finding the Fourth Proportional to 7,920.05, 11,881.87 and 4,220.33

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Solution

The fourth proportional to 7,920.05, 11,881.87 and 4,220.33 is: 6,331.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.05 : 11,881.87 = 4,220.33 : x
  2. Step 2: Convert to fraction form
    7,920.05/11,881.87 = 4,220.33/x
  3. Step 3: Cross multiply
    7,920.05x = 11,881.87 × 4,220.33
  4. Step 4: Simplify right side
    7,920.05x = 50,145,342.46
  5. Step 5: Solve for x
    x = 50,145,342.46/7,920.05
  6. Step 6: Final answer
    x = 6,331.45

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Similar ratio
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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.