Home / 21,639.43-29,862.07-12,078.82

Finding the Fourth Proportional to 21,639.43, 29,862.07 and 12,078.82

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Solution

The fourth proportional to 21,639.43, 29,862.07 and 12,078.82 is: 16,668.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.43 : 29,862.07 = 12,078.82 : x
  2. Step 2: Convert to fraction form
    21,639.43/29,862.07 = 12,078.82/x
  3. Step 3: Cross multiply
    21,639.43x = 29,862.07 × 12,078.82
  4. Step 4: Simplify right side
    21,639.43x = 360,698,568.36
  5. Step 5: Solve for x
    x = 360,698,568.36/21,639.43
  6. Step 6: Final answer
    x = 16,668.58

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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.