Home / 21,198.64-29,238.92-13,129.68

Finding the Fourth Proportional to 21,198.64, 29,238.92 and 13,129.68

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Solution

The fourth proportional to 21,198.64, 29,238.92 and 13,129.68 is: 18,109.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.64 : 29,238.92 = 13,129.68 : x
  2. Step 2: Convert to fraction form
    21,198.64/29,238.92 = 13,129.68/x
  3. Step 3: Cross multiply
    21,198.64x = 29,238.92 × 13,129.68
  4. Step 4: Simplify right side
    21,198.64x = 383,897,663.15
  5. Step 5: Solve for x
    x = 383,897,663.15/21,198.64
  6. Step 6: Final answer
    x = 18,109.54

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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.