Home / 21,288.42-29,389.84-12,792.64

Finding the Fourth Proportional to 21,288.42, 29,389.84 and 12,792.64

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Solution

The fourth proportional to 21,288.42, 29,389.84 and 12,792.64 is: 17,660.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.42 : 29,389.84 = 12,792.64 : x
  2. Step 2: Convert to fraction form
    21,288.42/29,389.84 = 12,792.64/x
  3. Step 3: Cross multiply
    21,288.42x = 29,389.84 × 12,792.64
  4. Step 4: Simplify right side
    21,288.42x = 375,973,642.78
  5. Step 5: Solve for x
    x = 375,973,642.78/21,288.42
  6. Step 6: Final answer
    x = 17,660.95

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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.