Home / 7,128.15-9,836.45-3,941.26

Finding the Fourth Proportional to 7,128.15, 9,836.45 and 3,941.26

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Solution

The fourth proportional to 7,128.15, 9,836.45 and 3,941.26 is: 5,438.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.15 : 9,836.45 = 3,941.26 : x
  2. Step 2: Convert to fraction form
    7,128.15/9,836.45 = 3,941.26/x
  3. Step 3: Cross multiply
    7,128.15x = 9,836.45 × 3,941.26
  4. Step 4: Simplify right side
    7,128.15x = 38,767,977.41
  5. Step 5: Solve for x
    x = 38,767,977.41/7,128.15
  6. Step 6: Final answer
    x = 5,438.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.