Home / 21,986.91-30,341.88-11,915.61

Finding the Fourth Proportional to 21,986.91, 30,341.88 and 11,915.61

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Solution

The fourth proportional to 21,986.91, 30,341.88 and 11,915.61 is: 16,443.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.91 : 30,341.88 = 11,915.61 : x
  2. Step 2: Convert to fraction form
    21,986.91/30,341.88 = 11,915.61/x
  3. Step 3: Cross multiply
    21,986.91x = 30,341.88 × 11,915.61
  4. Step 4: Simplify right side
    21,986.91x = 361,542,008.75
  5. Step 5: Solve for x
    x = 361,542,008.75/21,986.91
  6. Step 6: Final answer
    x = 16,443.51

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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.