Home / 21,128.34-29,158.08-11,696.91

Finding the Fourth Proportional to 21,128.34, 29,158.08 and 11,696.91

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Solution

The fourth proportional to 21,128.34, 29,158.08 and 11,696.91 is: 16,142.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.34 : 29,158.08 = 11,696.91 : x
  2. Step 2: Convert to fraction form
    21,128.34/29,158.08 = 11,696.91/x
  3. Step 3: Cross multiply
    21,128.34x = 29,158.08 × 11,696.91
  4. Step 4: Simplify right side
    21,128.34x = 341,059,284.33
  5. Step 5: Solve for x
    x = 341,059,284.33/21,128.34
  6. Step 6: Final answer
    x = 16,142.26

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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.