Home / 21,630.51-29,853.09-12,680.21

Finding the Fourth Proportional to 21,630.51, 29,853.09 and 12,680.21

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Solution

The fourth proportional to 21,630.51, 29,853.09 and 12,680.21 is: 17,500.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,630.51 : 29,853.09 = 12,680.21 : x
  2. Step 2: Convert to fraction form
    21,630.51/29,853.09 = 12,680.21/x
  3. Step 3: Cross multiply
    21,630.51x = 29,853.09 × 12,680.21
  4. Step 4: Simplify right side
    21,630.51x = 378,543,524.98
  5. Step 5: Solve for x
    x = 378,543,524.98/21,630.51
  6. Step 6: Final answer
    x = 17,500.44

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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.