Home / 21,618.79-29,833.78-12,664.37

Finding the Fourth Proportional to 21,618.79, 29,833.78 and 12,664.37

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Solution

The fourth proportional to 21,618.79, 29,833.78 and 12,664.37 is: 17,476.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.79 : 29,833.78 = 12,664.37 : x
  2. Step 2: Convert to fraction form
    21,618.79/29,833.78 = 12,664.37/x
  3. Step 3: Cross multiply
    21,618.79x = 29,833.78 × 12,664.37
  4. Step 4: Simplify right side
    21,618.79x = 377,826,028.42
  5. Step 5: Solve for x
    x = 377,826,028.42/21,618.79
  6. Step 6: Final answer
    x = 17,476.74

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1.5x scale

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.