Home / 21,129.69-29,159.49-11,698.26

Finding the Fourth Proportional to 21,129.69, 29,159.49 and 11,698.26

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Solution

The fourth proportional to 21,129.69, 29,159.49 and 11,698.26 is: 16,143.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.69 : 29,159.49 = 11,698.26 : x
  2. Step 2: Convert to fraction form
    21,129.69/29,159.49 = 11,698.26/x
  3. Step 3: Cross multiply
    21,129.69x = 29,159.49 × 11,698.26
  4. Step 4: Simplify right side
    21,129.69x = 341,115,295.49
  5. Step 5: Solve for x
    x = 341,115,295.49/21,129.69
  6. Step 6: Final answer
    x = 16,143.89

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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.