Home / 21,703.72-29,942.58-13,305.64

Finding the Fourth Proportional to 21,703.72, 29,942.58 and 13,305.64

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Solution

The fourth proportional to 21,703.72, 29,942.58 and 13,305.64 is: 18,356.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,703.72 : 29,942.58 = 13,305.64 : x
  2. Step 2: Convert to fraction form
    21,703.72/29,942.58 = 13,305.64/x
  3. Step 3: Cross multiply
    21,703.72x = 29,942.58 × 13,305.64
  4. Step 4: Simplify right side
    21,703.72x = 398,405,190.15
  5. Step 5: Solve for x
    x = 398,405,190.15/21,703.72
  6. Step 6: Final answer
    x = 18,356.54

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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.