Home / 21,821.12-30,113.27-12,261.41

Finding the Fourth Proportional to 21,821.12, 30,113.27 and 12,261.41

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Solution

The fourth proportional to 21,821.12, 30,113.27 and 12,261.41 is: 16,920.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.12 : 30,113.27 = 12,261.41 : x
  2. Step 2: Convert to fraction form
    21,821.12/30,113.27 = 12,261.41/x
  3. Step 3: Cross multiply
    21,821.12x = 30,113.27 × 12,261.41
  4. Step 4: Simplify right side
    21,821.12x = 369,231,149.91
  5. Step 5: Solve for x
    x = 369,231,149.91/21,821.12
  6. Step 6: Final answer
    x = 16,920.82

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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.