Home / 6,390.66-8,817.06-3,871.97

Finding the Fourth Proportional to 6,390.66, 8,817.06 and 3,871.97

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Solution

The fourth proportional to 6,390.66, 8,817.06 and 3,871.97 is: 5,342.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.66 : 8,817.06 = 3,871.97 : x
  2. Step 2: Convert to fraction form
    6,390.66/8,817.06 = 3,871.97/x
  3. Step 3: Cross multiply
    6,390.66x = 8,817.06 × 3,871.97
  4. Step 4: Simplify right side
    6,390.66x = 34,139,328.36
  5. Step 5: Solve for x
    x = 34,139,328.36/6,390.66
  6. Step 6: Final answer
    x = 5,342.07

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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.