Home / 6,890.20-9,508.58-3,905.97

Finding the Fourth Proportional to 6,890.20, 9,508.58 and 3,905.97

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Solution

The fourth proportional to 6,890.20, 9,508.58 and 3,905.97 is: 5,390.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,890.20 : 9,508.58 = 3,905.97 : x
  2. Step 2: Convert to fraction form
    6,890.20/9,508.58 = 3,905.97/x
  3. Step 3: Cross multiply
    6,890.20x = 9,508.58 × 3,905.97
  4. Step 4: Simplify right side
    6,890.20x = 37,140,228.22
  5. Step 5: Solve for x
    x = 37,140,228.22/6,890.20
  6. Step 6: Final answer
    x = 5,390.30

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1.5x scale

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.