Home / 21,161.72-29,204.12-12,087.86

Finding the Fourth Proportional to 21,161.72, 29,204.12 and 12,087.86

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Solution

The fourth proportional to 21,161.72, 29,204.12 and 12,087.86 is: 16,681.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.72 : 29,204.12 = 12,087.86 : x
  2. Step 2: Convert to fraction form
    21,161.72/29,204.12 = 12,087.86/x
  3. Step 3: Cross multiply
    21,161.72x = 29,204.12 × 12,087.86
  4. Step 4: Simplify right side
    21,161.72x = 353,015,326.55
  5. Step 5: Solve for x
    x = 353,015,326.55/21,161.72
  6. Step 6: Final answer
    x = 16,681.79

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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.