Home / 21,107.93-29,129.24-12,157.03

Finding the Fourth Proportional to 21,107.93, 29,129.24 and 12,157.03

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Solution

The fourth proportional to 21,107.93, 29,129.24 and 12,157.03 is: 16,776.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.93 : 29,129.24 = 12,157.03 : x
  2. Step 2: Convert to fraction form
    21,107.93/29,129.24 = 12,157.03/x
  3. Step 3: Cross multiply
    21,107.93x = 29,129.24 × 12,157.03
  4. Step 4: Simplify right side
    21,107.93x = 354,125,044.56
  5. Step 5: Solve for x
    x = 354,125,044.56/21,107.93
  6. Step 6: Final answer
    x = 16,776.87

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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.