Home / 21,724-29,979.12-12,292.57

Finding the Fourth Proportional to 21,724, 29,979.12 and 12,292.57

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Solution

The fourth proportional to 21,724, 29,979.12 and 12,292.57 is: 16,963.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,724 : 29,979.12 = 12,292.57 : x
  2. Step 2: Convert to fraction form
    21,724/29,979.12 = 12,292.57/x
  3. Step 3: Cross multiply
    21,724x = 29,979.12 × 12,292.57
  4. Step 4: Simplify right side
    21,724x = 368,520,431.14
  5. Step 5: Solve for x
    x = 368,520,431.14/21,724
  6. Step 6: Final answer
    x = 16,963.75

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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.