Home / 21,120.85-29,153.26-12,174.33

Finding the Fourth Proportional to 21,120.85, 29,153.26 and 12,174.33

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Solution

The fourth proportional to 21,120.85, 29,153.26 and 12,174.33 is: 16,804.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.85 : 29,153.26 = 12,174.33 : x
  2. Step 2: Convert to fraction form
    21,120.85/29,153.26 = 12,174.33/x
  3. Step 3: Cross multiply
    21,120.85x = 29,153.26 × 12,174.33
  4. Step 4: Simplify right side
    21,120.85x = 354,921,423.03
  5. Step 5: Solve for x
    x = 354,921,423.03/21,120.85
  6. Step 6: Final answer
    x = 16,804.32

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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.