Home / 21,139.47-29,172.39-11,708.03

Finding the Fourth Proportional to 21,139.47, 29,172.39 and 11,708.03

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Solution

The fourth proportional to 21,139.47, 29,172.39 and 11,708.03 is: 16,157.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.47 : 29,172.39 = 11,708.03 : x
  2. Step 2: Convert to fraction form
    21,139.47/29,172.39 = 11,708.03/x
  3. Step 3: Cross multiply
    21,139.47x = 29,172.39 × 11,708.03
  4. Step 4: Simplify right side
    21,139.47x = 341,551,071.43
  5. Step 5: Solve for x
    x = 341,551,071.43/21,139.47
  6. Step 6: Final answer
    x = 16,157.03

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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.