Home / 21,337.05-29,440.41-12,379.36

Finding the Fourth Proportional to 21,337.05, 29,440.41 and 12,379.36

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Solution

The fourth proportional to 21,337.05, 29,440.41 and 12,379.36 is: 17,080.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,337.05 : 29,440.41 = 12,379.36 : x
  2. Step 2: Convert to fraction form
    21,337.05/29,440.41 = 12,379.36/x
  3. Step 3: Cross multiply
    21,337.05x = 29,440.41 × 12,379.36
  4. Step 4: Simplify right side
    21,337.05x = 364,453,433.94
  5. Step 5: Solve for x
    x = 364,453,433.94/21,337.05
  6. Step 6: Final answer
    x = 17,080.78

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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.