Home / 21,118.66-29,143.52-11,687.29

Finding the Fourth Proportional to 21,118.66, 29,143.52 and 11,687.29

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Solution

The fourth proportional to 21,118.66, 29,143.52 and 11,687.29 is: 16,128.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.66 : 29,143.52 = 11,687.29 : x
  2. Step 2: Convert to fraction form
    21,118.66/29,143.52 = 11,687.29/x
  3. Step 3: Cross multiply
    21,118.66x = 29,143.52 × 11,687.29
  4. Step 4: Simplify right side
    21,118.66x = 340,608,769.86
  5. Step 5: Solve for x
    x = 340,608,769.86/21,118.66
  6. Step 6: Final answer
    x = 16,128.33

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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.