Home / 12,391.85-18,571.38-9,089.48

Finding the Fourth Proportional to 12,391.85, 18,571.38 and 9,089.48

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Solution

The fourth proportional to 12,391.85, 18,571.38 and 9,089.48 is: 13,622.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.85 : 18,571.38 = 9,089.48 : x
  2. Step 2: Convert to fraction form
    12,391.85/18,571.38 = 9,089.48/x
  3. Step 3: Cross multiply
    12,391.85x = 18,571.38 × 9,089.48
  4. Step 4: Simplify right side
    12,391.85x = 168,804,199.43
  5. Step 5: Solve for x
    x = 168,804,199.43/12,391.85
  6. Step 6: Final answer
    x = 13,622.19

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1.5x scale

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.