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Finding the Fourth Proportional to 21,697.30, 29,945.04 and 12,137.71

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Solution

The fourth proportional to 21,697.30, 29,945.04 and 12,137.71 is: 16,751.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,697.30 : 29,945.04 = 12,137.71 : x
  2. Step 2: Convert to fraction form
    21,697.30/29,945.04 = 12,137.71/x
  3. Step 3: Cross multiply
    21,697.30x = 29,945.04 × 12,137.71
  4. Step 4: Simplify right side
    21,697.30x = 363,464,286.32
  5. Step 5: Solve for x
    x = 363,464,286.32/21,697.30
  6. Step 6: Final answer
    x = 16,751.59

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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.