Home / 21,128.92-29,159.38-11,698.08

Finding the Fourth Proportional to 21,128.92, 29,159.38 and 11,698.08

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Solution

The fourth proportional to 21,128.92, 29,159.38 and 11,698.08 is: 16,144.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.92 : 29,159.38 = 11,698.08 : x
  2. Step 2: Convert to fraction form
    21,128.92/29,159.38 = 11,698.08/x
  3. Step 3: Cross multiply
    21,128.92x = 29,159.38 × 11,698.08
  4. Step 4: Simplify right side
    21,128.92x = 341,108,759.99
  5. Step 5: Solve for x
    x = 341,108,759.99/21,128.92
  6. Step 6: Final answer
    x = 16,144.16

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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.