Home / 7,420.70-11,116.65-4,127.90

Finding the Fourth Proportional to 7,420.70, 11,116.65 and 4,127.90

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Solution

The fourth proportional to 7,420.70, 11,116.65 and 4,127.90 is: 6,183.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.70 : 11,116.65 = 4,127.90 : x
  2. Step 2: Convert to fraction form
    7,420.70/11,116.65 = 4,127.90/x
  3. Step 3: Cross multiply
    7,420.70x = 11,116.65 × 4,127.90
  4. Step 4: Simplify right side
    7,420.70x = 45,888,419.54
  5. Step 5: Solve for x
    x = 45,888,419.54/7,420.70
  6. Step 6: Final answer
    x = 6,183.84

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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.