Home / 21,109.94-29,131.73-11,679.92

Finding the Fourth Proportional to 21,109.94, 29,131.73 and 11,679.92

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Solution

The fourth proportional to 21,109.94, 29,131.73 and 11,679.92 is: 16,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.94 : 29,131.73 = 11,679.92 : x
  2. Step 2: Convert to fraction form
    21,109.94/29,131.73 = 11,679.92/x
  3. Step 3: Cross multiply
    21,109.94x = 29,131.73 × 11,679.92
  4. Step 4: Simplify right side
    21,109.94x = 340,256,275.86
  5. Step 5: Solve for x
    x = 340,256,275.86/21,109.94
  6. Step 6: Final answer
    x = 16,118.30

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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.