Home / 10,916.12-16,370.94-3,989

Finding the Fourth Proportional to 10,916.12, 16,370.94 and 3,989

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Solution

The fourth proportional to 10,916.12, 16,370.94 and 3,989 is: 5,982.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,916.12 : 16,370.94 = 3,989 : x
  2. Step 2: Convert to fraction form
    10,916.12/16,370.94 = 3,989/x
  3. Step 3: Cross multiply
    10,916.12x = 16,370.94 × 3,989
  4. Step 4: Simplify right side
    10,916.12x = 65,303,679.66
  5. Step 5: Solve for x
    x = 65,303,679.66/10,916.12
  6. Step 6: Final answer
    x = 5,982.32

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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.