Home / 13,217.72-18,239.16-7,912.42

Finding the Fourth Proportional to 13,217.72, 18,239.16 and 7,912.42

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Solution

The fourth proportional to 13,217.72, 18,239.16 and 7,912.42 is: 10,918.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,217.72 : 18,239.16 = 7,912.42 : x
  2. Step 2: Convert to fraction form
    13,217.72/18,239.16 = 7,912.42/x
  3. Step 3: Cross multiply
    13,217.72x = 18,239.16 × 7,912.42
  4. Step 4: Simplify right side
    13,217.72x = 144,315,894.37
  5. Step 5: Solve for x
    x = 144,315,894.37/13,217.72
  6. Step 6: Final answer
    x = 10,918.37

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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.