Home / 21,719.73-29,971.78-12,287.69

Finding the Fourth Proportional to 21,719.73, 29,971.78 and 12,287.69

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Solution

The fourth proportional to 21,719.73, 29,971.78 and 12,287.69 is: 16,956.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.73 : 29,971.78 = 12,287.69 : x
  2. Step 2: Convert to fraction form
    21,719.73/29,971.78 = 12,287.69/x
  3. Step 3: Cross multiply
    21,719.73x = 29,971.78 × 12,287.69
  4. Step 4: Simplify right side
    21,719.73x = 368,283,941.39
  5. Step 5: Solve for x
    x = 368,283,941.39/21,719.73
  6. Step 6: Final answer
    x = 16,956.19

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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.