Home / 21,128.27-29,157.03-11,696.63

Finding the Fourth Proportional to 21,128.27, 29,157.03 and 11,696.63

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Solution

The fourth proportional to 21,128.27, 29,157.03 and 11,696.63 is: 16,141.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.27 : 29,157.03 = 11,696.63 : x
  2. Step 2: Convert to fraction form
    21,128.27/29,157.03 = 11,696.63/x
  3. Step 3: Cross multiply
    21,128.27x = 29,157.03 × 11,696.63
  4. Step 4: Simplify right side
    21,128.27x = 341,038,846.02
  5. Step 5: Solve for x
    x = 341,038,846.02/21,128.27
  6. Step 6: Final answer
    x = 16,141.36

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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.