Home / 21,074.11-29,079.30-12,118.34

Finding the Fourth Proportional to 21,074.11, 29,079.30 and 12,118.34

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Solution

The fourth proportional to 21,074.11, 29,079.30 and 12,118.34 is: 16,721.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.11 : 29,079.30 = 12,118.34 : x
  2. Step 2: Convert to fraction form
    21,074.11/29,079.30 = 12,118.34/x
  3. Step 3: Cross multiply
    21,074.11x = 29,079.30 × 12,118.34
  4. Step 4: Simplify right side
    21,074.11x = 352,392,962.50
  5. Step 5: Solve for x
    x = 352,392,962.50/21,074.11
  6. Step 6: Final answer
    x = 16,721.61

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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.