Home / 21,653.75-29,868.71-13,147.61

Finding the Fourth Proportional to 21,653.75, 29,868.71 and 13,147.61

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Solution

The fourth proportional to 21,653.75, 29,868.71 and 13,147.61 is: 18,135.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.75 : 29,868.71 = 13,147.61 : x
  2. Step 2: Convert to fraction form
    21,653.75/29,868.71 = 13,147.61/x
  3. Step 3: Cross multiply
    21,653.75x = 29,868.71 × 13,147.61
  4. Step 4: Simplify right side
    21,653.75x = 392,701,935.20
  5. Step 5: Solve for x
    x = 392,701,935.20/21,653.75
  6. Step 6: Final answer
    x = 18,135.51

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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.