Home / 21,111.26-29,133.96-11,680.16

Finding the Fourth Proportional to 21,111.26, 29,133.96 and 11,680.16

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Solution

The fourth proportional to 21,111.26, 29,133.96 and 11,680.16 is: 16,118.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.26 : 29,133.96 = 11,680.16 : x
  2. Step 2: Convert to fraction form
    21,111.26/29,133.96 = 11,680.16/x
  3. Step 3: Cross multiply
    21,111.26x = 29,133.96 × 11,680.16
  4. Step 4: Simplify right side
    21,111.26x = 340,289,314.23
  5. Step 5: Solve for x
    x = 340,289,314.23/21,111.26
  6. Step 6: Final answer
    x = 16,118.85

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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.