Home / 12,391.24-17,114.11-8,161.21

Finding the Fourth Proportional to 12,391.24, 17,114.11 and 8,161.21

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Solution

The fourth proportional to 12,391.24, 17,114.11 and 8,161.21 is: 11,271.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.24 : 17,114.11 = 8,161.21 : x
  2. Step 2: Convert to fraction form
    12,391.24/17,114.11 = 8,161.21/x
  3. Step 3: Cross multiply
    12,391.24x = 17,114.11 × 8,161.21
  4. Step 4: Simplify right side
    12,391.24x = 139,671,762.08
  5. Step 5: Solve for x
    x = 139,671,762.08/12,391.24
  6. Step 6: Final answer
    x = 11,271.81

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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.