Home / 21,551.06-29,743.20-12,121.45

Finding the Fourth Proportional to 21,551.06, 29,743.20 and 12,121.45

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Solution

The fourth proportional to 21,551.06, 29,743.20 and 12,121.45 is: 16,729.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,551.06 : 29,743.20 = 12,121.45 : x
  2. Step 2: Convert to fraction form
    21,551.06/29,743.20 = 12,121.45/x
  3. Step 3: Cross multiply
    21,551.06x = 29,743.20 × 12,121.45
  4. Step 4: Simplify right side
    21,551.06x = 360,530,637.28
  5. Step 5: Solve for x
    x = 360,530,637.28/21,551.06
  6. Step 6: Final answer
    x = 16,729.14

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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.