Home / 21,120.39-29,149.23-12,166.17

Finding the Fourth Proportional to 21,120.39, 29,149.23 and 12,166.17

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Solution

The fourth proportional to 21,120.39, 29,149.23 and 12,166.17 is: 16,791.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.39 : 29,149.23 = 12,166.17 : x
  2. Step 2: Convert to fraction form
    21,120.39/29,149.23 = 12,166.17/x
  3. Step 3: Cross multiply
    21,120.39x = 29,149.23 × 12,166.17
  4. Step 4: Simplify right side
    21,120.39x = 354,634,487.55
  5. Step 5: Solve for x
    x = 354,634,487.55/21,120.39
  6. Step 6: Final answer
    x = 16,791.10

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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.