Home / 21,681.56-29,919.92-12,121.46

Finding the Fourth Proportional to 21,681.56, 29,919.92 and 12,121.46

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Solution

The fourth proportional to 21,681.56, 29,919.92 and 12,121.46 is: 16,727.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.56 : 29,919.92 = 12,121.46 : x
  2. Step 2: Convert to fraction form
    21,681.56/29,919.92 = 12,121.46/x
  3. Step 3: Cross multiply
    21,681.56x = 29,919.92 × 12,121.46
  4. Step 4: Simplify right side
    21,681.56x = 362,673,113.48
  5. Step 5: Solve for x
    x = 362,673,113.48/21,681.56
  6. Step 6: Final answer
    x = 16,727.26

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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.