Home / 21,072.10-29,080.19-11,512.91

Finding the Fourth Proportional to 21,072.10, 29,080.19 and 11,512.91

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Solution

The fourth proportional to 21,072.10, 29,080.19 and 11,512.91 is: 15,888.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.10 : 29,080.19 = 11,512.91 : x
  2. Step 2: Convert to fraction form
    21,072.10/29,080.19 = 11,512.91/x
  3. Step 3: Cross multiply
    21,072.10x = 29,080.19 × 11,512.91
  4. Step 4: Simplify right side
    21,072.10x = 334,797,610.25
  5. Step 5: Solve for x
    x = 334,797,610.25/21,072.10
  6. Step 6: Final answer
    x = 15,888.19

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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.