Home / 21,112.14-29,134.38-11,680.70

Finding the Fourth Proportional to 21,112.14, 29,134.38 and 11,680.70

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Solution

The fourth proportional to 21,112.14, 29,134.38 and 11,680.70 is: 16,119.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.14 : 29,134.38 = 11,680.70 : x
  2. Step 2: Convert to fraction form
    21,112.14/29,134.38 = 11,680.70/x
  3. Step 3: Cross multiply
    21,112.14x = 29,134.38 × 11,680.70
  4. Step 4: Simplify right side
    21,112.14x = 340,309,952.47
  5. Step 5: Solve for x
    x = 340,309,952.47/21,112.14
  6. Step 6: Final answer
    x = 16,119.16

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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.