Home / 7,430.21-11,142.66-3,480.80

Finding the Fourth Proportional to 7,430.21, 11,142.66 and 3,480.80

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Solution

The fourth proportional to 7,430.21, 11,142.66 and 3,480.80 is: 5,219.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,430.21 : 11,142.66 = 3,480.80 : x
  2. Step 2: Convert to fraction form
    7,430.21/11,142.66 = 3,480.80/x
  3. Step 3: Cross multiply
    7,430.21x = 11,142.66 × 3,480.80
  4. Step 4: Simplify right side
    7,430.21x = 38,785,315.21
  5. Step 5: Solve for x
    x = 38,785,315.21/7,430.21
  6. Step 6: Final answer
    x = 5,219.95

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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.