Home / 6,160.40-9,240.60-5,139.80

Finding the Fourth Proportional to 6,160.40, 9,240.60 and 5,139.80

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Solution

The fourth proportional to 6,160.40, 9,240.60 and 5,139.80 is: 7,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,160.40 : 9,240.60 = 5,139.80 : x
  2. Step 2: Convert to fraction form
    6,160.40/9,240.60 = 5,139.80/x
  3. Step 3: Cross multiply
    6,160.40x = 9,240.60 × 5,139.80
  4. Step 4: Simplify right side
    6,160.40x = 47,494,835.88
  5. Step 5: Solve for x
    x = 47,494,835.88/6,160.40
  6. Step 6: Final answer
    x = 7,709.70

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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.