Home / 21,176.59-31,722.52-12,738.43

Finding the Fourth Proportional to 21,176.59, 31,722.52 and 12,738.43

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Solution

The fourth proportional to 21,176.59, 31,722.52 and 12,738.43 is: 19,082.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,176.59 : 31,722.52 = 12,738.43 : x
  2. Step 2: Convert to fraction form
    21,176.59/31,722.52 = 12,738.43/x
  3. Step 3: Cross multiply
    21,176.59x = 31,722.52 × 12,738.43
  4. Step 4: Simplify right side
    21,176.59x = 404,095,100.44
  5. Step 5: Solve for x
    x = 404,095,100.44/21,176.59
  6. Step 6: Final answer
    x = 19,082.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.