Home / 7,429.50-11,129.67-3,720.78

Finding the Fourth Proportional to 7,429.50, 11,129.67 and 3,720.78

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Solution

The fourth proportional to 7,429.50, 11,129.67 and 3,720.78 is: 5,573.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,429.50 : 11,129.67 = 3,720.78 : x
  2. Step 2: Convert to fraction form
    7,429.50/11,129.67 = 3,720.78/x
  3. Step 3: Cross multiply
    7,429.50x = 11,129.67 × 3,720.78
  4. Step 4: Simplify right side
    7,429.50x = 41,411,053.54
  5. Step 5: Solve for x
    x = 41,411,053.54/7,429.50
  6. Step 6: Final answer
    x = 5,573.87

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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.