Home / 15,876.39-21,912.99-9,163.21

Finding the Fourth Proportional to 15,876.39, 21,912.99 and 9,163.21

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Solution

The fourth proportional to 15,876.39, 21,912.99 and 9,163.21 is: 12,647.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,876.39 : 21,912.99 = 9,163.21 : x
  2. Step 2: Convert to fraction form
    15,876.39/21,912.99 = 9,163.21/x
  3. Step 3: Cross multiply
    15,876.39x = 21,912.99 × 9,163.21
  4. Step 4: Simplify right side
    15,876.39x = 200,793,329.10
  5. Step 5: Solve for x
    x = 200,793,329.10/15,876.39
  6. Step 6: Final answer
    x = 12,647.29

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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.